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How much water is to be added to dilute 10 mL of 10N HCl to make it decinormal?
(a) M eq. of conc.HCl = M eq. of dil. HCl;
10x10=Vx1/10
V=1000mL
Thus, 990mL of water should be added to 10mL if conc. HCl to get decinormal solution.
W1 g of an element combines with oxygen forming W2 g of its oxide. The equivalent mass of the element is:
(b) Equivalent of element = Equivalent of oxygen or W1 /E1=W2-W1/8
The normality of 4% (mass/Vol.) NaOH is:
(b) N = 4x1000/40x100 = 1.0
A compound contains atoms of three elements A,B and C. If the oxidation number of A is +2, Bis +5 and that of C is -2, the possible formula of the compound is
(b) In A3(BC4)2
3 X oxidation number of A + 2[oxidation number of B + 4 X oxidation number of C] = 0
3 X (+2) + 2[5+4X(-2)] =0
6+2[-3] = 0
The number of peroxide linkages in CrO5 is /are
Conversion of PbSO4 to Pbs is:
(a) Sulphur gets reduced from +6 to -2.
Aqueous solution of SO2 reacts with H2S to precipitate sulphur. Here SO2 acts as:
(c) S4+ + 4e S0; SO2 us reduced and thus, oxidant.
Which of the following is a redox reaction?
(d) Zn is oxidised and Ag is reduced.
In which of the following reaction,reduction of hydrogen takes place ?
(c) ; Steam is reduced.
Oxidation number of Fe in K3[Fe(CN)6] is:
(b) 3 x 1 + a + 6 x (-1) = 0
∴a = +3
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.