!["Govt Exam Prep: SSC, UPSC, PYQs & Free Mock Tests for All Exams"](https://blogger.googleusercontent.com/img/a/AVvXsEjVsD2dnvPupa8YhoqnYHEiDHoBgqO4OQiLZ6lX1nTibVeO_mB89VMulwRS_p1NArgSJVIYJBCzTcq-M4DqgIfm-UMxK9J3gLt_9-UwxICwEks2vEnKVA4Tkbsj0942FBYQD-vT8hRqKQ8ao8MkR1cfje5BlEKM-B7JcCNxDnVFaQmkewSdJCfNojcpGE0=s150 ""Govt Exam Prep: SSC, UPSC, PYQs & Free Mock Tests for All Exams"")
1. **Which one among the following is not a micronutrient for plants?**
- (a) Iron
- (b) Manganese
- (c) Magnesium
- (d) Chlorine
2. **Halophytes are the plants that grow on which one among the following categories of soil?**
- (a) Acidic soil
- (b) Saline soil
- (c) Black soil
- (d) Sandy soil
3. **Xylem in the plants are responsible for the transport of:**
- (a) Water
- (b) Water and dissolved minerals
- (c) Gases
- (d) Food
4. **Which one among the following hormones inhibits the growth activity in plants?**
- (a) Auxins
- (b) Cytokinins
- (c) Abscisic acid
- (d) Gibberellins
5. **Which of the following biomolecules does Starch belong to?**
- (a) Protein
- (b) Carbohydrate
- (c) Lipid
- (d) Nucleic acid
6. **Which one among the following is not a feature of Xerophytes?**
- (a) Smaller leaves
- (b) Large number of stomata
- (c) Waxy cuticle
- (d) Stomata in pits
7. **Which one among the following is not a part of the vascular bundle in plants?**
- (a) Phloem
- (b) Xylem
- (c) Cambium
- (d) Endodermis
8. **In which one among the following mediums would the speed of sound be maximum?**
- (a) Distilled water
- (b) Sea water
- (c) Drinking water
- (d) Methanol
9. **Which organelle in animal cells can digest foreign materials?**
- (a) Endoplasmic reticulum
- (b) Lysosome
- (c) Golgi body
- (d) Mitochondria
10. **Photosynthesis that converts light energy into chemical energy by the plants involves the use of green pigments of leaves called chlorophyll. The only structure in a leaf that hosts chlorophyll is:**
- (a) Nucleus
- (b) Ribosome
- (c) Chloroplast
- (d) Chromosome
11. **In which of the following colloids is the dispersing medium a liquid?**
- (a) Mist
- (b) Foam
- (c) Jelly
- (d) Shaving cream
12. **The two isotopes of elemental chlorine are:**
- (a) 17^35C and 17^36C
- (b) 17^34C and 18^36C
- (c) 17^35C and 18^31C
- (d) 17^30C and 17^37C
13. **Which one among the following metals is stored under oil?**
- (a) Sodium
- (b) Rubidium
- (c) Potassium
- (d) Lithium
14. **Potassium nitrate is not used:**
- (a) as a fertilizer
- (b) in medicine
- (c) in making gunpowder
- (d) as a preservative of meat products
15. **The surface of the concrete structure of a new construction is covered with straw/gunny bags by wetting. This is done to:**
- (a) prevent fast evaporation until hydration has proceeded well
- (b) protect the concrete structure from contamination by dust particles
- (c) prevent the development of any fungus on the surface
- (d) give a smoother and cleaner surface over the cement structure
16. **Which one among the following statements for the gases mentioned below is not correct?**
- (a) Hydrogen has 3 isotopes.
- (b) Helium is a commonly used gas in electric bulbs.
- (c) Oxygen is used to burn fuel in rocket engines in spacecraft.
- (d) Nitrogen can be used in gaseous form to replace air in food packaging.
17. **Match List-I with List-II and select the correct answer using the code given below the Lists:**
**List-I (Trade Name)**
- A. Bleaching powder
- B. Baking soda
- C. Washing soda
- D. Plaster of Paris
**List-II (Chemical Name)**
- 1. Sodium bicarbonate
- 2. Sodium carbonate, 10 water
- 3. Calcium oxychloride
- 4. Calcium sulfate, water 1/2
**Code:**
- (a) A-3, B-1, C-2, D-4
- (b) A-3, B-2, C-1, D-4
- (c) A-4, B-2, C-1, D-3
- (d) A-4, B-1, C-2, D-3
18. **Which one among the following statements is not true for glass?**
- (a) Sodium silicate is known as water glass.
- (b) Glass is also called a super-cooled liquid.
- (c) Crystallinity develops on cooling of the molten mass of the glass.
- (d) Colored glasses can be made by adding different coloring materials.
19. **Which one among the following is responsible for determining the chemical properties of an element?**
- (a) Protons
- (b) Electrons
- (c) Neutrons
20. **X-rays can be used to:**
- 1. Inspect welded joints between two metal parts of a machine.
- 2. Study the structure of crystals.
- (a) 1 only
- (b) 2 only
- (c) Both 1 and 2
- (d) Neither 1 nor 2
21. **Which one of the following heat transfers is an example of convection?**
- (a) Heating of food in a microwave oven
- (b) Boiling water in a pot on a gas stove
- (c) Feeling the warmth in the sun
- (d) Heating a brass rod at one end and observing the temperature rise at the other end
22. **The phenomenon of rainbow formation by water droplets involves:**
- (a) Single refraction of sunlight
- (b) One internal reflection of sunlight
- (c) Two internal reflections of sunlight
- (d) Both refraction and internal reflection of sunlight
23. **Which one among the following is used in bleaching of paper?**
- (a) Chloride
- (b) Chlorobenzene
- (c) Ammonium chloride
- (d) Hydrochloric acid
24. **Ozone hole is a region over:**
- (a) The Antarctic caused mainly by CFC gases.
- (b) The Antarctic caused mainly by carbon dioxide gas.
- (c) The Arctic caused mainly by CFC gases.
- (d) The Arctic caused mainly by carbon dioxide gas.
1. **Which one among the following is not a micronutrient for plants?**
- (a) Magnesium
- **Solution:** Micronutrients for plants include iron, manganese, zinc, copper, molybdenum, boron, and chlorine. Magnesium is a macronutrient.
2. **Halophytes are the plants that grow on which one among the following categories of soil?**
- (b) Saline soil
- **Solution:** Halophytes are salt-tolerant plants that grow in saline soils.
3. **Xylem in the plants are responsible for the transport of:**
- (b) Water and dissolved minerals
- **Solution:** Xylem is the tissue in vascular plants that transports water and dissolved minerals from roots to other parts of the plant.
4. **Which one among the following hormones inhibits the growth activity in plants?**
- (c) Abscisic acid
- **Solution:** Abscisic acid is a plant hormone that inhibits growth and promotes dormancy.
5. **Which of the following biomolecules does starch belong to?**
- (b) Carbohydrate
- **Solution:** Starch is a carbohydrate, specifically a polysaccharide, that serves as an energy reserve in plants.
6. **Which one among the following is not a feature of Xerophytes?**
- (b) Large number of stomata
- **Solution:** Xerophytes are plants adapted to dry environments, typically having fewer stomata to reduce water loss.
7. **Which one among the following is not a part of the vascular bundle in plants?**
- (d) Endodermis
- **Solution:** The vascular bundle in plants consists of xylem, phloem, and cambium. Endodermis is not a part of the vascular bundle.
8. **In which one among the following mediums would the speed of sound be maximum?**
- (b) Sea water
- **Solution:** The speed of sound is maximum in sea water due to its higher density compared to distilled water, drinking water, and methanol.
9. **Which organelle in animal cells can digest foreign materials?**
- (b) Lysosome
- **Solution:** Lysosomes contain digestive enzymes that break down foreign materials, waste products, and cellular debris.
10. **Photosynthesis that converts light energy into chemical energy by the plants involves the use of green pigments of leaves called chlorophyll. The only structure in a leaf that hosts chlorophyll is:**
- (c) Chloroplast
- **Solution:** Chloroplasts are the organelles in plant cells that contain chlorophyll and conduct photosynthesis.
11. **In which of the following colloids is the dispersing medium a liquid?**
- (a) Mist
- **Solution:** Mist is a colloidal dispersion where tiny liquid droplets are dispersed in a gas (air).
12. **The two isotopes of elemental chlorine are:**
- (a) \(^{17}C^{35}\) and \(^{17}C^{37}\)
- **Solution:** Chlorine has two common isotopes, \(^{35}Cl\) and \(^{37}Cl\), both having 17 protons but different numbers of neutrons.
13. **Which one among the following metals is stored under oil?**
- (a) Sodium
- **Solution:** Sodium is highly reactive with water and air, and therefore it is stored under oil to prevent it from reacting.
14. **Potassium nitrate is not used:**
- (d) As a preservative of meat products
- **Solution:** Potassium nitrate is used in fertilizers, gunpowder, and medicine, but not as a meat preservative.
15. **The surface of the concrete structure of a new construction is covered with straw/gunny bags by wetting. This is done to:**
- (a) Prevent fast evaporation, until hydration has proceeded well
- **Solution:** Keeping the surface wet prevents quick evaporation of water, which helps in proper hydration and curing of concrete.
16. **Which one among the following statements for the gases mentioned below is not correct?**
- (b) Helium is a commonly used gas in electric bulbs.
- **Solution:** Argon, not helium, is commonly used in electric bulbs to prevent the tungsten filament from oxidizing.
17. **Match List-I with List-II and select the correct answer using the code given below the Lists:**
- Correct Answer: (a) 3, 1, 2, 4
- **Solution:**
- A. Bleaching powder - Calcium oxychloride (3)
- B. Baking soda - Sodium bicarbonate (1)
- C. Washing soda - Sodium carbonate, 10 water (2)
- D. Plaster of Paris - Calcium sulphate, water 1/2 (4)
18. **Which one among the following statements is not true for glass?**
- (c) Crystallinity develops on cooling of the molten mass of the glass.
- **Solution:** Glass is an amorphous solid; it does not develop crystallinity on cooling.
19. **Which one among the following is responsible for determining the chemical properties of an element?**
- (b) Electrons
- **Solution:** The chemical properties of an element are primarily determined by its electrons, particularly the valence electrons.
20. **X-rays can be used to:**
- (c) Both 1 and 2
- **Solution:** X-rays can be used to inspect welded joints and study the structure of crystals.
21. **Which one of the following heat transfers is an example of convection?**
- (b) Boiling water in a pot on a gas stove
- **Solution:** Convection is the heat transfer by the movement of fluids; boiling water involves convection currents.
22. **The phenomenon of rainbow formation by water droplets involves:**
- (d) Both refraction and internal reflection of sunlight
- **Solution:** Rainbow formation involves the refraction, reflection, and dispersion of light in water droplets.
23. **Which one among the following is used in bleaching of paper?**
- (a) Chloride
- **Solution:** Chlorine compounds, such as chlorine dioxide, are used in the bleaching of paper.
24. **Ozone hole is a region over:**
- (a) The Antarctic caused mainly by CFC gases.
- **Solution:** The ozone hole over the Antarctic is primarily caused by chlorofluorocarbon (CFC) gases.