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Chemistry M.C.Q (1 Marks)

The d- and f-Block Elements · Rajasthan Board (RBSE) STD 12 Science (Rajasthan - English Medium). 41 questions.

Questions

M.C.Q (1 Marks)

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41 questions · self-marked practice — reveal the answer and mark yourself.

Question 151 Mark
The product obtained when acidic potassium permanganate solution is reacted with oxalate ion is :
Answer
b
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Question 161 Mark
Aqueous solution of $K _2 Cr _2 O _7$ reacts with $H _2 S$ under acidic conditions to give green product (A). (A) is :
Answer
a
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Question 191 Mark
Which atom exhibits the highest oxidation number among the following atoms with outermost electronic configuration?
Answer
d
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Question 211 Mark
$E _{ M ^{3+}}^0 M ^{2+}$ values for $Cr , Mn , Fe$ and Co are -0.41 , $+1.57,0.77$ and +1.97 respectively. Which of these metals will the oxidation state easily change from +2 to +3 ?
Answer
a
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Question 221 Mark
The correct order of decreasing values of second ionizatin enthalpy of $Ti (22), V (23), Cr (24)$ and $Mn (25)$ is :
Answer
a
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Question 271 Mark
What will be the change in the oxidation state of Cr when $SO _2$ gas is passed into the aqueous solution of $K _2 Cr _2 O _7$ ?
Answer
b
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Question 371 Mark
If the radius of $La ^{3+}$ (atomic number $=57$ ) is $1.06 \mathring A$, then the value (approximately) of the radius of $Lu ^{3+}$ (atomic number $=71$ ) will be :
Answer
c
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