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796. 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) : Bulb filament is made of titanium. 2. Reason (R) : The filament should have low melting point.
A. Both A and R are true and 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:
797. The most electronegative element among the following is :
A. Fluorine
B. Oxygen
C. Sodium
D. Sulphur
Explanation:
798. Speed of sound is greater in solids than in liquids because
A. the atoms in solids are regularly arranged
B. the atoms in liquids are loosely pacled
C. the solids have high elasticity
D. None of these
Explanation:
799. An element is best characterized by its:
A. electronic configuration
B. atomic number
C. atomic weight
D. atomic volume
Explanation:
800. According to Daltons atomic theory, the smallest particle which can exist independently is :
A. an atom
B. a molecule
C. a cation
D. an anion
Explanation:
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