1
IIT-JEE 2004 Screening
MCQ (Single Correct Answer)
+1
-0.25
A sodium salt on treatment with MgCl3 gives white precipitate only on heating. The anion of the sodium salt is
A
$$HCO_3^-$$
B
$$CO_3^{2-}$$
C
$$NO_3^{-}$$
D
$$SO_4^{2-}$$
2
IIT-JEE 2001 Screening
MCQ (Single Correct Answer)
+1
-0.25
The set representing the correct order of first ionization potential is
A
K > Na > Li
B
Be > Mg > Ca
C
B > C > N
D
Ge > Si > C
3
IIT-JEE 1996
MCQ (Single Correct Answer)
+1
-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
A < B < C < D
B
D < B < C < A
C
D < B < A < C
D
B < D < C < A
4
IIT-JEE 1994
MCQ (Single Correct Answer)
+2
-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.
A
Both S and E are true and E is the correct explanation of S
B
Both S and E are true but E is not the correct explanation of S
C
S is true but E is false
D
S is false but E is true
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