61) Which of the following is/are the example/examples of chemical change?
1. Crystallization of sodium chloride
2. Melting of ice
3. Souring of milk

Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) None


62) Among the following organisms, which one does not belong to the class of other three?
(a) Crab
(b) Mite
(c) Scorpion
(d) Spider


63) What are the significances of a practical approach to sugarcane production known as ‘Sustainable Sugarcane Initiative’?
1. Seed cost is very low in this compared to the conventional method of cultivation.
2. Drip irrigation can be practiced very effectively in this.
3. There is no application of chemical/ inorganic fertilizers at all in this.
4. The scope for intercropping is more in this compared to the conventional method of cultivation.

Select the correct answer using the code given below.
(a) 1 and 3 only
(b) 1, 2 and 4 only
(c) 2, 3 and 4 only
(d) 1, 2, 3 and 4



64) Consider the following pairs :
Programme/ Project Ministry
1. Drought-Prone Area Programme : Ministry of Agriculture
2. Desert Development Programme : Ministry of Environment and Forests
3. National Watershed Development Project for Rainfed Areas : Ministry of Rural Development

Which of the above pairs are correct
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) None



65) In the context of food and nutritional security of India, enhancing the ‘Seed Replacement Rates’ of various crops helps in achieving the food production targets of the future. But what is/are the constraint/ constraints in its wider / greater implementation?
1. There is no National Seeds Policy in place.
2. There is no participation of private sector seed companies in the supply of quality seeds of vegetables and planting materials of horticultural crops.
3. There is a demand-supply gap regarding quality seeds in case of low value and high volume crops.

Select the correct answer using the code given below.
(a) 1 and 2
(b) 3 only
(c) 2 and 3
(d) None


66) With reference to technologies for solar power production, consider the following statements:
1.’Photovoltaics’ is a technology that generates electricity by direct conversion of light into electricity, while ‘Solar Thermal’ is a technology that utilizes the Sun’s rays to generate heat which is further used in electricity generation process.
2. Photovoltaics generates Alternating Current (AC), while Solar Thermal generates Direct Current (DC).
3. India has manufacturing base for Solar Thermal technology, but not for Photovoltaics.

Which of the statements given above is / are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1, 2 and 3
(d) None



67) Which reference to Agni-IV Missile, which of the following statements is/are correct?
1. It is a surface-to-surface missile.
2. It is fuelled by liquid propellant only.
3. It can deliver one-tonne nuclear warheads about 7500 km away.
Select the correct answer using the code given below.

(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3



68) In addition to fingerprint scanning, which of the following can be used in the biometric identification of a person?
1. Iris scanning
2. Retinal scanning
3. Voice recognition

Select the correct answer using the code given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3



69) Consider the following techniques/phenomena:
1. Budding and grafting in fruit plants
2. Cytoplasmic male sterility
3. Gene silencing

Which of the above is/are used to create transgenic crops?
(a) 1 only
(b) 2 and 3
(c) 1 and 3
(d) None



70) Consider the following statements :
1. Maize can be used for the production of starch.
2. Oil extracted from maize can be a feedstock for biodiesel.
3. Alcoholic beverages can be produced by using maize.

Which of the statements given above is/are correct?
(a) 1 only.
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1, 2 and 3