IIT-JEE 2004 Screening | s-Block Elements Question 6 | Chemistry

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IIT-JEE 2004 Screening

MCQ (Single Correct Answer)

-0.25

A sodium salt on treatment with MgCl₃ gives white precipitate only on heating. The anion of the sodium salt is

$$HCO_3^-$$

$$CO_3^{2-}$$

$$NO_3^{-}$$

$$SO_4^{2-}$$

IIT-JEE 2001 Screening

MCQ (Single Correct Answer)

-0.25

The set representing the correct order of first ionization potential is

K > Na > Li

Be > Mg > Ca

B > C > N

Ge > Si > C

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

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