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386. The coolant used in car radiators is
A. tetraethyl lead
B. ethylene glycol
C. ethanol - water solution
D. benzene
Explanation:
387. Given below are two statements, labeled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ? 1. Assertion (A) : A white porcelain plate with black design on it heated to a high temperature. It is then suddenly taken into a dark room. It is observed that the black design appears bright while the white porcelain background remains dark. 2. Reason (R) : Good absorbers of heat are good radiators.
A. Both A and R are true but R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Explanation:
388. During the fermentation of sugras, the enzyme which converts glucose into ethyl alcohol is
A. Maltase
B. Invertase
C. Diastase
D. Zymase
Explanation:
389. Which of the following types of woods is specially used as railway sleepers ?
A. Mahogany
B. Ivory Wood
C. Green heart wood
D. Jarrah and barri
Explanation:
390. Given below are two statements, labeled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ? 1. Assertion (A) : Safety fuses are made up of materials having high melting point. 2. Reason (R) : Safety fuses should be resistant to electric current.
A. Both A and R are true but R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. Both A and R are false.
Explanation:
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