Q1
mcq
1 mark
Milk of Magnesia is used as __________.
- A. Tranquilizer
- B. Analgesic
- C. Antacid
- D. Anaesthetic
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Q2
mcq
1 mark
The addition of a catalyst during a chemical reaction alters, which of the following quantities ?
- A. Entropy
- B. Internal energy
- C. Activation energy
- D. Enthalpy
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Q3
mcq
1 mark
The metal extracted by Hall-Heroult process is :
- A. Cu
- B. Al
- C. Zn
- D. Ni
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Q4
mcq
1 mark
A magnetic moment of 1.73 BM will be shown by one among the following :
- A. [ ] -4 6 CoCl
- B. TiCl 4
- C. ( ) 2 34 Cu NH [ ] +
- D. ( ) 2 4Ni CN [ ] -
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Q5
mcq
1 mark
Which one is correctly matched ?
- A. Foam - mist
- B. Emulsion - smoke
- C. Sol - whipped cream
- D. Gel - butter
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Q6
mcq
1 mark
Which one of the following will cause common-ion-effect when added to the following dissociation equilibrium reaction ?
CH3COOH(aq) ⇌ CH3COO-(aq) + H+(aq)
- A. CH3COCl
- B. AgCl
- C. CH3Cl
- D. HCl
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Q7
mcq
1 mark
Carbon atoms in Fullerene with formula C60 have __________ hybridisation.
- A. sp2
- B. sp3
- C. sp3d
- D. sp
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Q8
mcq
1 mark
The most common oxidation state of Actinoids is :
- A. 14
- B. 12
- C. 16
- D. 13
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Q9
mcq
1 mark
Assertion : Hex-4-ennitrile on reaction with Di-isobutyl aluminium hydride followed by Hydrolysis gives Hex-4-enal.
Reason : Di-isobutyl aluminium hydride is a selective reducing agent.
- A. Assertion is true but Reason is false.
- B. Both Assertion and Reason are true, but reason is not the correct explanation of assertion.
- C. Both Assertion and Reason are false.
- D. Both Assertion and Reason are true and reason is the correct explanation of assertion.
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Q10
mcq
1 mark
Which of the following is used as the source of gamma rays ?
- A. Xe
- B. Ar
- C. Rn
- D. Kr
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Q11
mcq
1 mark
The emf of Standard Hydrogen Electrode (SHE) is __________.
- A. −1.0
- C. 1.1
- D. 11.0
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Q12
mcq
1 mark
The crystal with metal excess defect is :
- A. NaCl
- B. AgBr
- C. AgCl
- D. FeO
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Q13
mcq
1 mark
Which of the following base is not present in DNA ?
- A. Uracil
- B. Adenine
- C. Cytosine
- D. Guanine
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Q14
mcq
1 mark
Which of the following compound is used as an anti-freeze in automobile radiator ?
- A. Methanol
- B. Ethane-1, 2-diol
- C. Ethanol
- D. Glycerol
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Q15
mcq
1 mark
The product formed by the reaction of an Aromatic aldehyde with primary amines is :
- A. Schiff’s base
- B. Carboxylic acid
- C. Ketone
- D. Aromatic acid
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Q16
short answer
Which type of ores can be concentrated by froth floatation method ? Give two examples for such ores.
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Q18
short answer
Define the term central atom in co-ordination compounds.
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Q19
short answer
Calculate the number of atoms in an FCC unit cell.
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Q22
short answer
How will you convert acetone into propane ?
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Q24
short answer
Identify the compounds A and B in the following sequence of reactions.
$$CH_3CH_2NO_2 \xrightarrow{Sn/HCl} A \xrightarrow{CH_3COCl} B$$
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Q25
short answer
Write a note on Fischer tropsch synthesis.
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Q26
short answer
Write any three differences between Lanthanoids and Actinoids.
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Q27
short answer
For the complex, $[Pt(NO_2)(H_2O)(NH_3)_2]Br$ identify the following.
(a) Central metal atom/ion
(b) Co-ordination number
(c) Oxidation number of central metal ion
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Q28
short answer
Write a note on Helmholtz electrical double layer.
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Q31
short answer
How will you convert Ethylacetate into Ethylaceto acetate ?
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Q32
short answer
What are food preservatives ? Give two examples.
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Q33
short answer
Show that in case of first order reaction the time required for the completion of 99% is twice the time required for the completion of 90% of the reaction.
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Q34
long answer
Explain zone refining process with an example.
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Q35
long answer
(i) Find the oxidation state of Halogen in the following compounds. (1) $OF_2$ (2) $I_2O_4$ (ii) Complete the following reactions. (1) $P_4 + NaOH + H_2O \rightarrow$ (2) $XeF_6 + H_2O \rightarrow$ (3) $Cu + conc. H_2SO_4 \rightarrow$
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Q36
long answer
(i) Describe the structure of Diborane. (ii) Write ethylborate test.
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Q37
long answer
Describe the nature of bonding in metallic carbonyls.
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Q39
long answer
(i) Give two examples for zero order reaction. (ii) How colloids are used in tanning of leather and in Rubber industry ?
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Q40
long answer
Explain the mechanism of nucleophilic substitution reaction.
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Q41
long answer
(i) Why do not phenol, benzyl chloride undergo $S_N2$ reaction? (ii) How is propan-2-ol synthesized ?
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Q42
short answer
Find the oxidation state of Halogen in the following compounds. (1) $OF_2$ (2) $I_2O_4$
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Q43
short answer
Complete the following reactions. (1) $P_4 + NaOH + H_2O \rightarrow$ (2) $XeF_6 + H_2O \rightarrow$ (3) $Cu + conc. H_2SO_4 \rightarrow$
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Q46
short answer
Give two examples for zero order reaction.
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Q47
short answer
How colloids are used in tanning of leather and in Rubber industry ?
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Q48
long answer
Derive an expression for Ostwald’s Dilution Law.
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Q49
short answer
Why aniline does not undergo Friedel Craft’s reaction ?
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Q51
short answer
How Malachitegreen is prepared from Benzaldehyde ?
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Q52
short answer
Write short note on Thorpe nitrile Condensation reaction.
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Q53
long answer
Compound (A) of molecular formula $C_6H_6O$ gives purple colouration with neutral $FeCl_3$. Compound (A) reacts with ammonia to give Compound (B ) and it also reacts with Zn dust to give Compound (C). Identify the Compounds A, B and C and write down the equations.
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