1
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because
A
Zn act as oxidising agent when react with HNO3
B
HNO3 is weaker acid than H2SO4 and HCl
C
In electrochemical series Zn is above hydrogen
D
NO$$_3^ - $$ is reduced in preference to hydronium ion.
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
$${}_{92}^{235}$$U, nucleus absorbs a neutron and distintegrate in $${}_{54}^{139}$$Xe, $${}_{38}^{94}$$Sr and $$x$$ so, what will be product $$x$$?
A
3-neutrons
B
2-neutrons
C
$$\alpha $$-particle
D
$$\beta $$-particle
3
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
In the silver plating of copper, K[Ag(CN)2] is used instead of AgNO3. The reason is
A
a thin layer of Ag is formed on Cu
B
more voltage is required
C
Ag+ ions are completely removed from solution
D
less availability of Ag+ ions, as Cu can not displace Ag from [Ag(CN)2]$$-$$ ion.
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Atomic number of Cr and Fe are respectively 24 and 26, which of the following is paramagetic with the spin of electron?
A
[Cr(CO)6]
B
[Fe(CO)5]
C
[Fe(CN)6]4$$-$$
D
[Cr(NH3)6]3+