Glycine is a sulphur containing amino acid.
Correct Answer
Step-by-Step AI Explanation
Verified Method
Glycine is a neutral amino acid. It has two hydrogen atoms attached to the alpha carbon besides one carboxylic group and one amino group. Sulphur-containing amino acids are Cysteine and Methionine.
Q63mcq
Which one of the following statements is wrong?
a.
Sucrose is a disaccharide.
b.
Cellulose is a polysaccharide.
c.
Uracil is a pyrimidine.
d.
Glycine is a sulphur containing amino acid.
Correct Answer
Step-by-Step AI Explanation
Verified Method
Glycine is the simplest amino acid and does not contain sulphur. Sulphur-containing amino acids include methionine and cysteine.
Q90mcq
A typical fat molecule is made up of
a.
Three glycerol molecules and one fatty acid molecule
b.
One glycerol and three fatty acid molecules
Correct Answer
c.
One glycerol and one fatty acid molecule
d.
Three glycerol and three fatty acid molecules
Step-by-Step AI Explanation
Verified Method
In a typical fat molecule (triglyceride), three fatty acids are found esterified with one glycerol molecule.
Q136mcq
Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behaviour?
a.
C + 2H2SO4 → CO2 + 2SO2 + 2H2O
b.
CaF2 + H2SO4 → CaSO4 + 2HF
Correct Answer
c.
Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O
d.
3S + 2H2SO4 → 3SO2 + 2H2O
Step-by-Step AI Explanation
Verified Method
In the reaction CaF2 + H2SO4 → CaSO4 + 2HF, the oxidation numbers of all atoms remain unchanged; therefore, it is an acid-base displacement reaction, not a redox reaction.
Q137mcq
Which of the following pairs of d-orbitals will have electron density along the axes?
a.
dz^2, dx^2-y^2
Correct Answer
b.
dxy, dx^2-y^2
c.
dxz, dz^2
d.
dxz, dyz
Step-by-Step AI Explanation
Verified Method
The dz^2 and dx^2-y^2 orbitals have electron density concentrated along the x, y, and z axes, whereas dxy, dyz, and dxz have density between the axes.
Q138mcq
The correct geometry and hybridization for XeF4 are:
a.
Planar triangle, sp3d3
b.
Square planar, sp3d2
Correct Answer
c.
Octahedral, sp3d2
d.
Trigonal bipyramidal, sp3d
Step-by-Step AI Explanation
Verified Method
XeF4 has 4 bond pairs and 2 lone pairs (AB4L2 type), leading to sp3d2 hybridization and square planar shape.
Q139mcq
Among the following which one is a wrong statement?
a.
SeF4 and CH4 have same shape
Correct Answer
b.
I3+ has bent geometry
c.
PH5 and BiCl5 do not exist
d.
pπ-dπ bonds are present in SO2
Step-by-Step AI Explanation
Verified Method
SeF4 (sp3d, see-saw shape) and CH4 (sp3, tetrahedral shape) do not have the same shape.
Q140mcq
The correct increasing order of trans-effect of the following species is:
a.
Br- > CN- > NH3 > C6H5-
b.
CN- > Br- > C6H5- > NH3
c.
NH3 > CN- > Br- > C6H5-
d.
CN- > C6H5- > Br- > NH3
Correct Answer
Step-by-Step AI Explanation
Verified Method
The order of trans-effect strength is CN- > C6H5- > Br- > NH3.
Q141mcq
Which one of the following statements related to lanthanons is incorrect?
a.
All the lanthanons are much more reactive than aluminium
Correct Answer
b.
Ce(+4) solutions are widely used as oxidizing agent in volumetric analysis
c.
Europium shows +2 oxidation state.
d.
The basicity decreases as the ionic radius decreases from Pr to Lu.
Step-by-Step AI Explanation
Verified Method
Lanthanoids are generally less reactive than aluminum due to high ionization potential resulting from lanthanoid contraction.
Q142mcq
Jahn-Teller effect not observed in high spin complexes of:
a.
d4
b.
d9
c.
d7
d.
d8
Correct Answer
Step-by-Step AI Explanation
Verified Method
Jahn-Teller distortion occurs in unsymmetrically filled orbitals. High spin d8 complexes (t2g6 eg2) are symmetrically filled, thus showing no significant distortion.
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A given nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by HNO2 to give an unstable compound B. B, on treatment with phenol, forms a beautiful coloured compound C with the molecular formula C12H10N2O. The structure of compound A is :
a.
Structure 1
b.
Structure 2
c.
Structure 3
d.
Structure 4
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Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9 g, the atomic weights of X and Y are :
a.
20, 30
b.
30, 20
c.
40, 30
d.
60, 40
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The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds (charge on electron = 1.60 × 10^-19 C) is :
a.
3.75 × 10^20
b.
7.48 × 10^23
c.
6 × 10^23
d.
6 × 10^20
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