1
JEE Main 2023 (Online) 1st February Evening Shift
+4
-1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Gypsum is used for making fireproof wall boards.

Reason (R) : Gypsum is unstable at high temperatures.

In the light of the above statements, choose the correct answer from the options given below :

A
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
B
Both (A) and (R) are correct and (R) is the correct explanation of (A)
C
(A) is correct but (R) is not correct
D
(A) is not correct but (R) is correct
2
JEE Main 2023 (Online) 1st February Morning Shift
+4
-1

Match List I with List II :

List I List II
A. Slaked lime I. $$\mathrm{NaOH}$$
B. Dead burnt plaster II. $$\mathrm{Ca(OH)_2}$$
C. Caustic soda III. $$\mathrm{Na_2CO_3\cdot 10H_2O}$$
D. Washing soda IV. $$\mathrm{CaSO_4}$$

Choose the correct answer from the options given below:

A
(A) - III, (B) - IV, (C) - II, (D) - I
B
(A) - III, (B) - II, (C) - IV, (D) - I
C
(A) - II, (B) - IV, (C) - I, (D) - III
D
(A) - I, (B) - IV, (C) - II, (D) - III
3
JEE Main 2023 (Online) 1st February Morning Shift
+4
-1

Choose the correct statement(s) :

A. Beryllium oxide is purely acidic in nature.

B. Beryllium carbonate is kept in the atmosphere of $$\mathrm{CO_2}$$.

C. Beryllium sulphate is readily soluble in water.

D. Beryllium shows anomalous behaviour.

Choose the correct answer from the options given below :

A
A only
B
B, C and D only
C
A, B and C only
D
A and B only
4
JEE Main 2023 (Online) 31st January Evening Shift
+4
-1
The element playing significant role in neuromuscular function and interneuronal transmission is :
A
Be
B
$\mathrm{Ca}$
C
$\mathrm{Mg}$
D
$\mathrm{Li}$
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