IIT-JEE 1996 | s-Block Elements Question 14 | Chemistry

IIT-JEE 1996

MCQ (Single Correct Answer)

-0.25

The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order
K₂CO₃ (A), MgCO₃ (B), CaCO₃ (C), BeCO₃ (D)

A < B < C < D

D < B < C < A

D < B < A < C

B < D < C < A

IIT-JEE 1994

MCQ (Single Correct Answer)

-0.5

Statement (S) The alkali metals can form ionic hydrides which contain the hydride ion H^-.
Explanation (E) The alkali metals have low electronegativity; their hydrides conduct electricity when fused and liberate hydrogen at the anode.

Both S and E are true and E is the correct explanation of S

Both S and E are true but E is not the correct explanation of S

S is true but E is false

S is false but E is true

IIT-JEE 1987

MCQ (Single Correct Answer)

-0.25

The metallic lustre exhibited by sodium is explained by

diffusion of sodium ions

oscillation of loose electrons

excitation of free protons

existence of body centered cubic lattice

IIT-JEE 1986

MCQ (Single Correct Answer)

-0.25

The pair of compound which cannot exist together in solution is:

NaHCO₃ and NaOH

Na₂CO₃ and NaHCO₃

Na₂CO₃ and NaOH

NaHCO₃ and NaCl

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