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336. Isotopes are separated by
A. filtration
B. sublimation
C. distillation
D. crystallisation
Explanation:
337. Which of the following is not a symptom of heart attack ?
A. Nausea and sweating
B. Squeezy feeling in chest
C. Numbness and aching of arms
D. Pains in legs
Explanation:
338. The flame which has the highest temperature among the following is
A. hydrogen - nitrogen
B. oxy - acetylene
C. oxy - hydrogen
D. None of these
Explanation:
339. Uranium is a naturally occurring radioactive element which emits alpha particles and is converted into
A. Radium
B. Thorium
C. Actinium
D. Plutonium
Explanation:
340. 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) : Phtosynthesis and vision are the phenomenon of visible light. 2. Reason (R) : The visible light is absorbed by small particles containing chlorophylls, as well as the retina of the eye.
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:
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