ICSE chemistry
Sponsor Area
Fill in the blanks by choosing the appropriate word/words from those given in the
brackets:
(increases, decreases, positive, efficient, 68, non-efficient, no α-hydrogen, α-hydrogen,
negative, Rosenmund’s, greater, Cannizzaro, 74, common-ion effect, lesser, buffer
action, diamagnetic, paramagnetic)
(i) The more__________ the standard reduction potential of a metal, the ________ is
its ability to displace hydrogen from acids.
(ii) Both ccp and hcp are ____________ packings and occupy about _________% of
the available space.
(iii) Solubility of silver chloride _____________ in the presence of sodium chloride
because of _____________.
(iv) Benzaldehyde undergoes ___________ reaction on treatment with concentrated
sodium hydroxide because it has ___________ atom.
(v) The transition metals show ______________ character because of the presence of
unpaired electrons and Cu+ is _____________because its electronic configuration
is [Ar]3d10.
negative, greater
,efficient, 74
,decreases, common-ion effect
,Cannizzaro, no α- hydrogen
,paramagnetic, diamagnetic
Sponsor Area
Complete the following statements by selecting the correct alternative from the choices given:
The molal freezing point constant of water is 1·86 K kg mol-1 . Therefore, the freezing point of 0·1M NaCl solution in water is expected to be:
-
-1·86oC
-
-0·372oC
-
-0·186oC
-
+0·372oC
B.
-0·372oC
Complete the following statements by selecting the correct alternative from the
choices given:
For a first order reaction the rate constant for decomposition of N2O5 is 6×10-4sec-1.
The half-life period for the decomposition in seconds is:
-
11·55
-
115·5
-
1155
-
1·155
C.
1155
Complete the following statements by selecting the correct alternative from the
choices given:
When acetaldehyde is treated with Grignard reagent, followed by hydrolysis the
product formed is:
-
Primary alcohol
-
Secondary alcohol
-
Carboxylic acid
-
Tertiary alcohol
B.
Secondary alcohol
Complete the following statements by selecting the correct alternative from the choices given:
The geometry of XeF6 molecule and the hybridization of Xe atom in the molecule is:
-
Distorted octahedral and sp3d3
-
Square planar and sp3d2
-
Pyramidal and sp3
-
Octahedral and sp3d3
D.
Octahedral and sp3d3
Sponsor Area
Mock Test Series
Mock Test Series