Amongst the given option which of the following molecules/ion acts as a Lewis acid?
 1 $$OH^-$$ 2 $$NH_3$$ 3 $$H_2O$$ 4 $$BF_3$$
Subtopic:  Acids & Bases - Definitions & Classification |
71%
From NCERT
NEET - 2023
Hints

The equilibrium concentration of the species in the reaction $$A+B \rightleftharpoons C+D$$ are 2, 3, 10 and 6 mol L-1, respectively at 300 K .$$\Delta G^o$$ for the reaction is: (R = 2 cal/mol K)
1. -13.73 cal
2. 1372.60 cal
3. -137.26 cal
4. -1381.80 cal
Subtopic:  Introduction To Equilibrium |
63%
From NCERT
NEET - 2023
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An acidic buffer is prepared by mixing:
 1 weak acid and it's salt with strong base 2 equal volumes of equimolar solutions of weak acid and weak base 3 strong acid and it's salt with strong base 4 strong acid and it's salt with weak base (The pKa of acid = pKb of the base)
Subtopic:  Buffer |
73%
From NCERT
NEET - 2023
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For a weak acid HA, the percentage of dissociation is nearly 1% at equilibrium. If the concentration of acid is 0.1 mol L-1, then the correct option for its Ka at the same temperature is:
 1 $$1 \times 10^{-4}$$ 2 $$1 \times 10^{-6}$$ 3 $$1 \times 10^{-5}$$ 4 $$1 \times 10^{-3}$$
Subtopic:  Ionisation Constant of Acid, Base & Salt |
61%
From NCERT
NEET - 2023
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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]
 1 2.57 2 5.57 3 3.57 4 4.57
Subtopic:  pH calculation |
60%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

$$3 \mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{O}_{3}(\mathrm{g})$$
For the above reaction at 298 K, $$K_c$$ is found to be $$3.0 \times 10^{-59}$$. If the concentration of $$O_2$$ at equilibrium is 0.040 M, then the concentration of $$O_3$$ in M is:
1. $$1.2 \times 10^{21}$$
2. $$4.38 \times 10^{-32}$$
3. $$1.9 \times 10^{-63}$$
4. $$2.4 \times 10^{31}$$

Subtopic:  Introduction To Equilibrium |
65%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The solubility product of $$BaSO_4$$ in water is $$1.5 \times 10^{-9}$$. The molar solubility of $$BaSO_4$$ in 0.1 M solution of Ba(NO3)2 in-
1. $$2.0 \times 10^{-8} M$$
2. $$0.5 \times 10^{-8} M$$
3. $$1.5 \times 10^{-8} M$$
4. $$1.0 \times 10^{-8} M$$

Subtopic:  Solubility Product |
81%
From NCERT
NEET - 2022
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Consider the following reaction taking place in 1L capacity container at 300 K.
$$A +B \rightleftharpoons C+D$$
If one mole each of A and B are present initially and at equilibrium 0.7 mol of C is formed, then the equilibrium constant $$(K_c)$$ for the reaction is

 1 9.7 2 1.2 3 6.2 4 5.4
Subtopic:  Introduction To Equilibrium |
76%
From NCERT
NEET - 2022
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If 0.01 M acetic acid solution is 1% ionised, then pH of this acetic acid solution is :
1.  3
2.  2
3.  4
4.  1
Subtopic:  pH calculation |
65%
From NCERT
NEET - 2022
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Kp for the following reaction is 3.0 at 1000 K.

$$CO_{2}(g)\,+\,C(s)\rightarrow \,2CO(g)$$

The value of Kfor the reaction at the same temperature is:
(Given - R = 0.083 L bar K-1 mol-1)

1. 0.36
2. 3.6 × 10-2
3. 3.6 × 10-3
4. 3.6
Subtopic:  Introduction To Equilibrium |
76%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh