Tushar Sir's Chemistry

Which of the following is an alcohol?

1 year ago | [YT] | 4

Tushar Sir's Chemistry

Revise regularly to do well in the exam

1 year ago | [YT] | 3

Tushar Sir's Chemistry

From Aldehyde and Ketone

1..- CHO is
a.. meta directive b.. deactivating c..both a and b d.. ortho and para directive

2..In Cannizzaro's reaction , which of the following(s) is /are true a.. The aldehyde should have no alpha H b..Conc NaOH should be used c.. It undergoes disproportionation reaction d...All of the above

3..In Aldol condensation reaction
a..The carbonyl compound has an alpha H
b..Dilute NaOH should be used
c..Alpha H can be released as H+ in presence of OH-
d..All of the above

4..Tollens reagent is
a.. a mild oxidizing agent
b..oxidizes aldehyde and Silver mirror is formed in the reaction.
c..unable to oxidise ketones
d..unable to oxidise Benzaldehyde.

5..Write notes on
A..Fehling solution
B.. Crossed Cannizzaro' s reaction
C..Crossed Aldol condensation

1 year ago (edited) | [YT] | 1

Tushar Sir's Chemistry

MCQ..... Diborane can easily reduce
a) Ester
b) Nitro alkane
c) Halo alkane
d) Carboxylic acid

1 year ago | [YT] | 1

Tushar Sir's Chemistry

Questions for 9th class students....

1..Which laws of chemical combination says chemical equations should be written in balanced form?

2..What ever may be the source of CO, the mass ratio of C and O is constant in all cases, Which law of chemical combination is applicable?

3..Number of C¹² atoms in 12 gram of C¹² is......I.e. known as.....

4..Which of the following element has atomic mass 23u?
a) K b) Na c) Nitrogen d) Oxygen

5..Which of the following has molecular mass 44u?
a)Carbon dioxide b) CO c) NaH d) Ammonia

6..1/12 th of C¹² atom is known as
a) 1u b) 1g c) 12 g d) 12 u

7) Atomic mass of K is 39u,
Is it exact atomic mass or relative atomic mass? Why is it so called?

8..Which of the following is a molecule?
a) H2 b) O2 c) CO2 d) All

8.. Formula of Potassium sulphate is
a) K2 S b) K2SO4 c)P2SO4 d) Na2SO4

9..Which is not corrrect about Iron(II) chloride?
a) Ferrous chloride b) Ferric chloride c) Formula is FeCl2 d) It is written according to stock notation.

10..Which element has atomicity 4?
a) Phosphorus b) Sulphur
c) Ozone d) Diamond

11..The ratio by mass of Carbon and Oxygen in a compound is 3:4, Then the ratio by number atoms for that molecule is...
a) 1:1 b) 3:4 c) 1:2 d) 4:3

12.. In which case atomicity is 1
a) Sulphur b) Phosphorus c) C60 d) Neon

13..In which compound formula unit mass is calculated?
a) NaCl b) KCl c) H2O d) both a) and b)

14..Au is the symbol of
a) Argon b) Gold c) Actinium d) Lead

15..Which is/are true?
a) Co is an atom and CO is a molecule.
b) Formula of Magnesium nitride is Mg3N2.
c) Formula unit mass of CaCl2 is 111u
d) All

1 year ago | [YT] | 2

Tushar Sir's Chemistry

Questions from
Carbon and its compounds.
(For 10th students)

1.. Carbon cannot form C⁴+ , why?

2.. Carbon cannot form C⁴-, why?

3.. Carbon can satisfy its valency by
a) sharing
b) transference of valencecelectrons
c) both a and b
d) none of the above

4..Number of Carbon compounds are more than 3 million, because of
a) Catenation
b) Tetracovalency of Carbon
c) both a) and b)
d) none of the above

5..Which is/ are true?
a) NH4CNO on heating gives urea( 1st organic compound prepared in lab)
b) Covalency of Carbon is 4.
c) Alkanes are saturated hydrocarbons.
d) All of the above.

6..Which of the following is a functional group?
a) -COOH
b) - CHO
c) -CO-
d) All of the above

7..What is the IUPAC name of CH3CH2CHO?
a) Propanal
b) Propanol
c) Propanone
d) Propane

8..In CH3CH2COCH3, -CO- is
a) denoted by suffix 'one'
b) a reactive part of the molecule
c) a bivalent functional group
d) All of the above

1 year ago | [YT] | 2

Tushar Sir's Chemistry

QUESTIONS FROM

ALDEHYDE AND KETONE ......
(For 12th students)

1..Which of the following compounds will give yellow colour product with Iodine / NaOH?
a) Methyl carbinol
b) Pentan-2-one
c) Pentan-2-ol
d) Acetophenone
e) Ethanol

2..Write the IUPAC names of .....
a) C6H5COCH2CH3
b) OHCCH2CH(CHO)CH2CHO
c) CHOCOCOOH
d) NCCH2COOH

3..Which of the following compound will not show Rosenmund's reduction?
a) HCOCl
b) CH3COCl
c) C6H5COCl
d) none of the above

4..Which is/are correct about DIBAL H?
a) Electrophilic reducing agent
b) Can reduce esters, lactones and nitrites
c) Cannot reduce multiplebond/ nitro group/ Carboxylic group d) All of the above


5.. Carbonyl Carbon is
a) Nucleophilic
b) Electrophilic
C) both a and b
d) can't be told

6..What is the name of the starting alkene, when the products are 1 mole of glyoxal and 2 moles of Ethanal during Ozonolysis?
a) Hexa-2,4-diene
b) Hexa-1,3-diene
C) Hexa-1,4- diene
d) Hex-2,4- diene

7..Which of the following will give water as a bi product on heating with Cu at 300°C?
a) Prapan-1-ol
b) Isopropyl alcohol
c) 2-Methylpropan-2-ol
d) none of the above

8.. Write notes on
a) Gattermann Koch reaction
b) Gattermann reaction
c) Etard's reaction
d) Stephen reaction

9..Convert
a) Benzene to Acetone
b) Ethanol to Benzene diazonium chloride
c) Toluene to Benzaldehyde
d) Ethyl chloride to Propiophenone

10. Which of the following will not show Fridel Craft's reaction?
a) Phenol
b) Benzoic acid
C) Aniline
d) none of the above

1 year ago (edited) | [YT] | 8

Tushar Sir's Chemistry

All pray for SUNITA WILLIAMS, FOR HER SAFE RETURN TO EARTH.

1 year ago (edited) | [YT] | 2

Tushar Sir's Chemistry

Friedel Crafts reaction is shown by

2 years ago | [YT] | 4

Tushar Sir's Chemistry

What is the percentage of gold in 18 carat gold?

2 years ago | [YT] | 1