Given :-
(a) $0.005 M H_{2} S O_{4}$
(b) $0.1 M N a_{2} S O_{4}$
(c) $10^{- 2} M N a O H$
(d) $0.01 M H C l$
Choose the correct code having same $p H :$

a, c, d

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b, d

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a, d

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a, c

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Solution

The correct option is A $a, d$
$(a)$ $0.005$ $M$ $H_{2} S O_{4}$
$0.01$ $N$ so, $p H = 2$

$(b)$ $0.1$ $M$ $N a_{2} S O_{4}$
Salt of $S A + S B \to N e u t r a l$ so, $p H = 7$

$(c)$ $10^{- 2}$ $N a O H$
So, $p O H = 2$ and $p H = 12$

$(d)$ $0.01$ $M$ $H C l$
So, $p H = 2$

Thus $a, d$ have same pH.

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Rearrange the following zones as seen in the root in vertical section and choose the correct option.

A. Root hair zone B. Zone of meristems

C. Root cap zone D. Zone of maturation

E.Zone of elongation

Codes

(a) C, B, E, A, D (b) A, B, C, D, E (c) D, E, A, C, B (d) E, D, C, B, A

C_{4}

\to a, \to b, \to c

\to d

\to a \times \to b = \to c \times \to d

\to a \times \to c = \to b \times \to d

(\to a - \to d) \times (\to b - \to c) = \to 0

(\to a \times \to d) \times (\to b \times \to c) = \to 0

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