1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

RMgX + CO2 $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{ether}^{dry}} $$ Y $$\buildrel {{H_3}{O^ + }} \over \longrightarrow $$ RCOOH

What is Y in the above reaction?

A
RCOO$$-$$Mg+X
B
R3CO$$-$$Mg+X
C
RCOO$$-$$X+
D
(RCOO)2Mg
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Given below are half cell reactions:

$$MnO_4^ - + 8{H^ + } + 5{e^ - } \to M{n^{2 + }} + 4{H_2}O$$,

$$E_{M{n^{2 + }}/MnO_4^ - }^o = - 1.510\,V$$

$${1 \over 2}{O_2} + 2{H^ + } + 2{e^ - } \to {H_2}O$$

$$E_{{O_2}/{H_2}O}^o = + 1.223\,V$$

Will the permanganate ion, $$MnO_4^ - $$ liberate O2 from water in the presence of an acid?

A
Yes, because $$E_{cell}^o$$ = + 0.287 V
B
No, because $$E_{cell}^o$$ = $$-$$0.287 V
C
Yes, because $$E_{cell}^o$$ = + 2.733 V
D
No, because $$E_{cell}^o$$ = $$-$$ 2.733 V
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

What mass of 95% pure CaCO3 will be required to neutralise 50 mL of 0.5 M HCl solution according to the following reaction?

CaCO3(s) + 2HCl(aq) $$\to$$ CaCl2(aq) + Co2(g) + 2H2O(l)

[Calculate upto second place of decimal point]

A
1.25 g
B
1.32 g
C
3.65 g
D
9.50 g
4
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is [Given pKa of CH3COOH = 4.57]

A
5.57
B
3.57
C
4.57
D
2.57
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