11th Standard Syllabus & Materials
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Published on: 10/11/2020
11th Standard Chemistry English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Ten
Download Tamil Nadu 11th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Chemistry Test
1.
Consider the reaction,
CH3CH2CH2Br + NaCN → CH3CH2CH2CN + NaBr
This reaction will be the fastest in __________
ethanol
methanol
DMF (N, N' – dimethyl formanide)
water
2.
In the reaction 
X is ________.
3.
In which of the following molecules, all atoms are co-planar ___________
both (a) and (b)
4.
An alkyl bromide (A) reacts with sodium in ether to form 4, 5– diethyloctane, the compound (A) is _________
CH3 (CH2)3 Br
CH3(CH2)5 Br
CH3(CH2)3 CH(Br)CH3
\({ CH }_{ 3 }-{ \left( { CH }_{ 2 } \right) }_{ 2 }-CH\left( Br \right) -\underset { \overset { { | } }{ { CH }_{ 3 } } }{ { CH }_{ 2 } } \)
5.
Hyper Conjugation is also known as ___________.
no bond resonance
Baker - nathan effect
both (a)and (b)
none of these
6.
A sample of 0.5g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50mL of 0.5M H2SO4. The remaining acid after neutralisation by ammonia consumed 80mL of 0.5 MNaOH, The percentage of nitrogen in the organic compound is __________
14%
28%
42%
56%
7.
The IUPAC name of the compound 
is ____________
3 – Ethyl -2– hexene
3 – Propyl -3– hexene
4 – Ethyl – 4 – hexene
3 – Propyl -2-hexene
8.
Shape of ClF3 is _____________
Planar triangular
Pyramidal
'T' Shaped
none of these
9.
Which of the following expressions represents the electron probability function?
\(4\pi r dr{ \Psi }^{ 2 }\)
\(4\pi r^2 dr{ \Psi }\)
\(4\pi r^2 dr{ \Psi }^{ 2 }\)
\(4\pi r dr{ \Psi }\)
10.
Given that the energy of the first Bohr about is -1312 kJ mol-1, the ionisation energy of hydrogen atom is ___________
-1312 kJ
1312 kJ
21.8 x 10-20 J
2.18 x 10-19 J
11.
Maximum deviations from ideal gas is expected from ___________
H2(g)
N2(g)
CH4(g)
NH3(g)
12.
What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10ms-1?
6.62 \(\times\) 10-34m
6.626 \(\times\) 1034m
6.626 \(\times\) 10-34m
6.626 \(\times\) 1034m
13.
According to Bohr's theory angular momentum of an electron in 6th orbit is _____________
\(2.5\frac { h }{ \pi } \)
\(6\frac { h }{ \pi } \)
\(3\frac { h }{ \pi } \)
\(\frac { 2.5h }{ 2\pi } \)
14.
The value of Bohr radius for hydrogen atom is ___________
0.529 \(\times\) 10-8 cm
0.529 \(\times\) 10-10 cm
0.529 \(\times\) 10-12 cm
0.529 \(\times\) 10-12 cm
15.
Which of the following conclusions could not be derived from Rutherford's \(\alpha\)-particle scattering experiment?
Most of the space in the atom is empty.
The radius of the atom is about 10-10 m while that of the nucleus is 10-15 m
Electrons move in a circular path of fixed energy called orbits.
Nucleus and the electrons are held together by electrostatic force of attraction
16.
The radius of nucleus is approximately ________ times smaller than the radius of atom.
1,00,000
5,000
10,000
200
17.
Which is the lightest among the following?
An atom of hydrogen
An electron
A neutron
A proton
18.
Consider the following statements
1. \(\lambda\) = h / mv is valid only when the particle travels at speed much less than the speed of light.
2. Einstein's mass-energy relationship is E = mc2
3. The angular momentum (mvr) ofthe electron must be equal to an integral multiple of h/4\(\pi\) . Which of the following statements) given above is/ are correct?
1&3
Only 1
1 & 2
1, 2 & 3
19.
J. J. Thomson's cathode ray experiment revealed that atoms consist of _____________
electrons
protons
neutrons
photons
20.
C(diamond) ) ⟶ C(graphite), ΔH = -ve, this indicates that ___________
graphite is more stable than diamond
graphite has more energy than diamond
both are equally stable
stability cannot be predicted
21.
What is the mass of precipitate formed when 50 ml of 8.5 % solution of AgNO3 is mixed with 100 ml of 1.865 % potassium chloride solution ?
3.59 g
7g
14 g
28 g
22.
Electron density in the yz plane of 3dxy orbital is ___________
zero
0.50
0.75
0.90
23.
Which of the following electronic configuration represent the element in ground state?
1s22s12p1
1s22s22p1
1s22s12px12py12pz1
1s22s22p63s23px13py13pz13d1
24.
Assertion (A): Bohr's orbits are also called stationary states.
Reason (R): Electrons are stationary is an orbit.
Codes:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) Both A and R are false
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is true but R is false
Both A and R are false
1.
(c)
DMF (N, N' – dimethyl formanide)
2.
(b)
3.
(d)
both (a) and (b)
4.
(d)
\({ CH }_{ 3 }-{ \left( { CH }_{ 2 } \right) }_{ 2 }-CH\left( Br \right) -\underset { \overset { { | } }{ { CH }_{ 3 } } }{ { CH }_{ 2 } } \)
5.
(c)
both (a)and (b)
6.
(b)
28%
7.
(a)
3 – Ethyl -2– hexene
8.
(c)
'T' Shaped
9.
(d)
\(4\pi r dr{ \Psi }\)
10.
(b)
1312 kJ
11.
(d)
NH3(g)
12.
(a)
6.62 \(\times\) 10-34m
13.
(c)
\(3\frac { h }{ \pi } \)
14.
(a)
0.529 \(\times\) 10-8 cm
15.
(c)
Electrons move in a circular path of fixed energy called orbits.
16.
(a)
1,00,000
17.
(b)
An electron
18.
(c)
1 & 2
19.
(a)
electrons
20.
(a)
graphite is more stable than diamond
21.
(a)
3.59 g
22.
(a)
zero
23.
(b)
1s22s22p1
24.
(c) A is true but R is false
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - துணைப்பாடம் - யானை டாக்டர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set A
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