SOLVED PAPER 2022 (CDS) (I) (General Awareness)

Total Questions: 120

11. While burning hydrocarbon fuels, if we see a yellow flame with lots of black smoke, it means that the fuel is

Correct Answer: (b) made of unsaturated hydrocarbons
Solution:Unsaturated hydrocarbon fuels burn with a yellow flame. Also a lot of black smoke is formed with along it. It is due to incomplete combustion of these compounds in air.

12. The number of saturated and unsaturated bonds in cyclohexane are

Correct Answer: (c) 18 and 0 respectively
Solution:

The structure of cyclohexane is
as follows

Thus, the number of saturated
(single bond) and unsaturated
bond (i.e. double bond) are 18
and 0 respectively.

13. Which one of the following statements is true when non-metals are dissolved in water?

Correct Answer: (b) They produce acidic oxides.
Solution:Generally, when non-metals are dissolved in water they produce acidic oxides.

14. Which one of the following statements is not correct with regard to genetically modified organisms?

Correct Answer: (b) This technique has applications only in plants.
Solution:Genetically modified organisms are organisms, whose genome has been genetically modified. In this technique, a gene from an organism is isolated and transferred to the cell of another organism. By this technique, various useful genes like those insect resistance can be transferred. However, this technique has applications both in plants as well as in animals. Thus, statement (b) is not related to genetically modified organisms.

15. Suppose, due to an accident, the delicate lining of the mouth and the oesophagus of a person is injured. In this case, which one of the following tissues will be affected?

Correct Answer: (c) Squamous epithelium
Solution:If due to an accident, the delicate lining of the mouth and the oesophagus of a person gets injured, thus, in this case squamous epithelium tissue will get affected. This tissue is formed of a single layer of flattened polygonal cells and are found in the lining of the mouth and the oesophagus and also the alveoli of lungs.

16. Which one of the following statements is correct about the cell membrane?

Correct Answer: (c) It is flexible and enables the cell to engulf many materials.
Solution:Statement (c) is correct. The cell membrane or the plasma membrane is made up of organic molecules like lipids and proteins that are flexible in nature. The flexibility of cell membrane allows the cell to intake food and other materials from surroundings. Other statements are incorrect regarding plasma/cell membrane.

17. Plants prepare glucose in the process of

Correct Answer: (b) photosynthesis
Solution:Plants prepare glucose in the process of photosynthesis. The process of photosynthesis requires intake of carbon dioxide from the atmosphere, sunlight and water from surroundings to synthesise carbohydrates like glucose and starch. The excess glucose synthesised is

stored as starch.

18. The disease rickets develops in children due to the deficiency of

Correct Answer: (b) vitamin-D
Solution:The disease Rickets occurs due to a prolonged deficiency of vitamin-D in the body. It is essential for the absorption of calcium and phosphorous. Thus, insufficient vitamin-D leads to an imbalance in the calcium-phosphorous levels which cause softening of bones in children.

19. Match List I with List II and select the correct answer using the code given below the lists.

List-I (Blood Vessel)List-II (Function)
A. Pulmonary artery1. Carries blood from lungs to heat
B. Capillaries2. Carries blood to heart muscle
C. Coronary artery3. Connection between arteries and veins
D. Pulmonary vein4. Carries blood from heart to lungs

 

Code:ABCD
(a)4321
(b)4231
(c)1234
(d)1324
Correct Answer: (a)
Solution:The correct match is A-4, B-3, C-2, D-1.

Pulmonary artery is the only artery which carry oxygenated blood. It carries oxygen-deficient blood out of the heart to the lungs.

Capillaries are delicate blood vessels which form a network throughout the body. These are connections between arteries and veins. Coronary artery supply blood to the heart muscles.

Pulmonary veins is the only veins which carry oxygenated blood. It carry oxygen-rich blood from lungs to heart.

20. Which one of the following statements is true with regard to a greenhouse?

Correct Answer: (a) The shorter wavelength infrared radiations from the Sun can enter into the greenhouse while longer wavelength infrared radiations from the ground and the plants inside the greenhouse cannot pass back out through the glass.
Solution:A greenhouse is a glass house designed to help plants survive in relatively colder climates around the world. The shorter wavelength infrared radiations from the sun can enter into the greenhouse while longer wavelength infrared radiations from the ground and plants inside the greenhouse cannot pass back out through the glass.