Q. How many members are nominated by the President of India to the Rajya Sabha? (2023)
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Solution
The President of India nominates 12 members to the Rajya Sabha from among persons having special knowledge or practical experience in fields such as literature, science, art, and social service.
Correct Answer:
B
— 12
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Q. How many members are nominated by the President to the Rajya Sabha? (2019)
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Solution
The President of India nominates 12 members to the Rajya Sabha from among persons having special knowledge or practical experience in literature, science, art, and social service.
Correct Answer:
B
— 12
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Q. How many members are nominated to the Rajya Sabha by the President of India? (2021)
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Solution
The President of India nominates 12 members to the Rajya Sabha.
Correct Answer:
B
— 12
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Q. How many members are there in the Rajya Sabha?
A.
250
B.
245
C.
240
D.
200
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Solution
The Rajya Sabha can have a maximum of 250 members, out of which 238 are elected and 12 are nominated.
Correct Answer:
B
— 245
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Q. How many members can the President of India nominate to the Rajya Sabha? (2022)
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Solution
The President of India can nominate 12 members to the Rajya Sabha from among persons having special knowledge or practical experience in fields such as literature, science, art, and social service.
Correct Answer:
B
— 12
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Q. How many millimeters are there in a meter?
A.
10
B.
100
C.
1000
D.
10000
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Solution
There are 1000 millimeters in a meter.
Correct Answer:
C
— 1000
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Q. How many molecules are in 0.1 moles of oxygen gas (O2)? (2021)
A.
6.022 x 10^22
B.
6.022 x 10^23
C.
1.2044 x 10^23
D.
3.011 x 10^23
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Solution
Number of molecules = moles x Avogadro's number = 0.1 moles x 6.022 x 10^23 molecules/mole = 6.022 x 10^22 molecules.
Correct Answer:
A
— 6.022 x 10^22
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Q. How many molecules are in 0.25 moles of oxygen gas (O2)? (2022)
A.
3.011 x 10^23
B.
6.022 x 10^22
C.
1.2044 x 10^23
D.
1.5055 x 10^23
Show solution
Solution
Number of molecules = moles x Avogadro's number = 0.25 moles x 6.022 x 10^23 molecules/mole = 1.5055 x 10^23 molecules.
Correct Answer:
B
— 6.022 x 10^22
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Q. How many molecules are present in 2 moles of water (H2O)?
A.
6.022 x 10^23
B.
1.2044 x 10^24
C.
3.011 x 10^23
D.
12.044 x 10^24
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Solution
Number of molecules = moles x Avogadro's number = 2 moles x 6.022 x 10^23 molecules/mole = 1.2044 x 10^24 molecules.
Correct Answer:
B
— 1.2044 x 10^24
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Q. How many molecules are present in 2 moles of water (H2O)? (2022) 2022
A.
6.022 x 10^23
B.
1.2044 x 10^24
C.
3.011 x 10^23
D.
1.2044 x 10^23
Show solution
Solution
Number of molecules = moles x Avogadro's number = 2 moles x 6.022 x 10^23 molecules/mole = 1.2044 x 10^24 molecules.
Correct Answer:
B
— 1.2044 x 10^24
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Q. How many moles are in 1.5 kg of KCl?
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Solution
Molar mass of KCl = 39 + 35.5 = 74.5 g/mol. Number of moles = mass/molar mass = 1500 g / 74.5 g/mol ≈ 20.1 moles.
Correct Answer:
B
— 20
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Q. How many moles are in 10 grams of NaOH?
A.
0.25
B.
0.5
C.
0.75
D.
1
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Solution
Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol. Number of moles = mass/molar mass = 10 g / 40 g/mol = 0.25 moles.
Correct Answer:
A
— 0.25
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Q. How many moles are in 100 grams of CaCO3?
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Solution
Molar mass of CaCO3 = 40 + 12 + 3*16 = 100 g/mol. Number of moles = mass/molar mass = 100 g / 100 g/mol = 1 mole.
Correct Answer:
A
— 1
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Q. How many moles are in 100 grams of NaOH? (2022)
A.
2.5
B.
1.25
C.
0.5
D.
3
Show solution
Solution
Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol. Number of moles = mass/molar mass = 100 g / 40 g/mol = 2.5 moles.
Correct Answer:
B
— 1.25
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Q. How many moles are in 180 grams of water?
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Solution
Molar mass of H2O = 2*1 + 16 = 18 g/mol. Number of moles = 180 g / 18 g/mol = 10 moles.
Correct Answer:
A
— 1
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Q. How many moles are in 200 grams of H2O?
A.
11.11
B.
10
C.
9
D.
8.89
Show solution
Solution
Molar mass of H2O = 18 g/mol. Number of moles = mass / molar mass = 200 g / 18 g/mol = 11.11 moles.
Correct Answer:
A
— 11.11
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Q. How many moles are in 200 grams of H2SO4?
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Solution
Molar mass of H2SO4 = 2 + 32 + 16*4 = 98 g/mol. Number of moles = 200 g / 98 g/mol = 2.04 moles.
Correct Answer:
B
— 2
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Q. How many moles are in 32 grams of O2? (2021)
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Solution
Molar mass of O2 = 16*2 = 32 g/mol. Number of moles = mass/molar mass = 32g/32g/mol = 1 mole.
Correct Answer:
A
— 1
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Q. How many moles are in 36 grams of water (H2O)?
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Solution
Molar mass of H2O = 2*1 + 16 = 18 g/mol. Number of moles = mass/molar mass = 36 g / 18 g/mol = 2 moles.
Correct Answer:
A
— 1
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Q. How many moles are in 5.6 liters of a gas at STP?
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Solution
At STP, 1 mole of gas occupies 22.4 L. Number of moles = volume / molar volume = 5.6 L / 22.4 L/mole = 0.25 moles.
Correct Answer:
C
— 1
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Q. How many moles are in 5.6 liters of an ideal gas at STP?
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Solution
At STP, 1 mole of gas occupies 22.4 L. Therefore, number of moles = 5.6 L / 22.4 L/mole = 0.25 moles.
Correct Answer:
B
— 0.5
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Q. How many moles are in 50 grams of CaCO3?
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Solution
Molar mass of CaCO3 = 100 g/mol. Number of moles = mass / molar mass = 50 g / 100 g/mol = 0.5 moles.
Correct Answer:
B
— 1
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Q. How many moles are in 50 grams of H2O?
A.
2.78
B.
1.39
C.
0.56
D.
3.06
Show solution
Solution
Molar mass of H2O = 2*1 + 16 = 18 g/mol. Number of moles = mass/molar mass = 50 g / 18 g/mol = 2.78 moles.
Correct Answer:
B
— 1.39
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Q. How many moles are in 50 grams of NaOH?
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Solution
Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol. Number of moles = mass/molar mass = 50 g / 40 g/mol = 1.25 moles.
Correct Answer:
B
— 0.5
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Q. How many moles are in 50 grams of sodium (Na)?
A.
1.08
B.
2.5
C.
0.5
D.
0.25
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Solution
Molar mass of Na = 23 g/mol. Number of moles = mass / molar mass = 50 g / 23 g/mol ≈ 2.17 moles.
Correct Answer:
A
— 1.08
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Q. How many moles are in 500 mL of a 2 M NaCl solution?
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Solution
Moles = molarity x volume (in L) = 2 M x 0.5 L = 1 mole.
Correct Answer:
B
— 1
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Q. How many moles are in 88 grams of CH4?
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Solution
Molar mass of CH4 = 12 + 4*1 = 16 g/mol. Number of moles = mass/molar mass = 88 g / 16 g/mol = 5.5 moles.
Correct Answer:
B
— 2
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Q. How many moles are in 88 grams of O2?
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Solution
Molar mass of O2 = 16*2 = 32 g/mol. Number of moles = mass/molar mass = 88 g / 32 g/mol = 2.75 moles.
Correct Answer:
B
— 2
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Q. How many moles are in 88 grams of oxygen (O2)?
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Solution
Molar mass of O2 = 32 g/mol. Number of moles = mass / molar mass = 88 g / 32 g/mol = 2.75 moles.
Correct Answer:
A
— 2
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Q. How many moles of CO2 are produced from the complete combustion of 1 mole of C3H8?
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Solution
C3H8 + 5O2 → 3CO2 + 4H2O. 1 mole of C3H8 produces 3 moles of CO2.
Correct Answer:
A
— 3
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