Q. Which method is commonly used for identifying groups in a chemical reaction? (2021)
-
A.
Spectroscopy
-
B.
Chromatography
-
C.
Titration
-
D.
Electrophoresis
Solution
Chromatography is a technique used to separate and identify components in a mixture, making it effective for group identification.
Correct Answer: B — Chromatography
Learn More →
Q. Which method is often used in forensic science for group identification? (2023)
-
A.
Mass spectrometry
-
B.
Filtration
-
C.
Titration
-
D.
Chromatography
Solution
Mass spectrometry is widely used in forensic science for the identification of substances and groups due to its accuracy and sensitivity.
Correct Answer: A — Mass spectrometry
Learn More →
Q. Which microbe is primarily responsible for the fermentation of vinegar? (2021)
-
A.
Yeast
-
B.
Lactic acid bacteria
-
C.
Acetic acid bacteria
-
D.
Molds
Solution
Acetic acid bacteria are responsible for the fermentation process that converts alcohol into vinegar.
Correct Answer: C — Acetic acid bacteria
Learn More →
Q. Which microbe is primarily responsible for the production of vinegar? (2020)
-
A.
Yeast
-
B.
Lactic acid bacteria
-
C.
Acetic acid bacteria
-
D.
Molds
Solution
Acetic acid bacteria are responsible for the fermentation process that produces vinegar.
Correct Answer: C — Acetic acid bacteria
Learn More →
Q. Which microbe is primarily responsible for the production of yogurt? (2018)
-
A.
Lactobacillus
-
B.
Escherichia coli
-
C.
Staphylococcus
-
D.
Bacillus subtilis
Solution
Lactobacillus is the primary bacterium used in the fermentation of milk to produce yogurt.
Correct Answer: A — Lactobacillus
Learn More →
Q. Which microbe is primarily responsible for the spoilage of food? (2019)
-
A.
Bacteria
-
B.
Fungi
-
C.
Viruses
-
D.
Both bacteria and fungi
Solution
Both bacteria and fungi can cause food spoilage through their metabolic activities.
Correct Answer: D — Both bacteria and fungi
Learn More →
Q. Which mineral is crucial for oxygen transport in the blood?
-
A.
Calcium
-
B.
Iron
-
C.
Zinc
-
D.
Magnesium
Solution
Iron is crucial for oxygen transport as it is a key component of hemoglobin in red blood cells.
Correct Answer: B — Iron
Learn More →
Q. Which mineral is primarily involved in the formation of chlorophyll? (2019)
-
A.
Magnesium
-
B.
Calcium
-
C.
Phosphorus
-
D.
Sulfur
Solution
Magnesium is a central component of the chlorophyll molecule, essential for photosynthesis.
Correct Answer: A — Magnesium
Learn More →
Q. Which mineral is primarily involved in the synthesis of chlorophyll? (2019)
-
A.
Magnesium
-
B.
Calcium
-
C.
Phosphorus
-
D.
Iron
Solution
Magnesium is a central component of the chlorophyll molecule, which is essential for photosynthesis.
Correct Answer: A — Magnesium
Learn More →
Q. Which modulation technique is most commonly used in digital communication systems?
-
A.
Amplitude Modulation (AM)
-
B.
Frequency Modulation (FM)
-
C.
Phase Shift Keying (PSK)
-
D.
Quadrature Amplitude Modulation (QAM)
Solution
Quadrature Amplitude Modulation (QAM) is widely used in digital communication systems due to its efficiency in transmitting data.
Correct Answer: D — Quadrature Amplitude Modulation (QAM)
Learn More →
Q. Which modulation technique is most commonly used in FM radio broadcasting?
-
A.
Amplitude Modulation
-
B.
Frequency Modulation
-
C.
Phase Modulation
-
D.
Pulse Code Modulation
Solution
Frequency Modulation (FM) is the standard technique used in FM radio broadcasting due to its resistance to noise.
Correct Answer: B — Frequency Modulation
Learn More →
Q. Which modulation technique is most commonly used in television broadcasting?
-
A.
Amplitude Modulation (AM)
-
B.
Frequency Modulation (FM)
-
C.
Phase Modulation (PM)
-
D.
Pulse Code Modulation (PCM)
Solution
Frequency Modulation (FM) is commonly used in television broadcasting due to its better noise immunity.
Correct Answer: B — Frequency Modulation (FM)
Learn More →
Q. Which modulation technique is used to transmit digital data over an analog channel?
-
A.
AM
-
B.
FM
-
C.
PSK
-
D.
ASK
Solution
Phase Shift Keying (PSK) is a modulation technique used to transmit digital data over an analog channel.
Correct Answer: C — PSK
Learn More →
Q. Which modulation technique varies the amplitude of the carrier signal?
-
A.
Frequency Modulation
-
B.
Amplitude Modulation
-
C.
Phase Modulation
-
D.
Pulse Modulation
Solution
Amplitude Modulation (AM) varies the amplitude of the carrier signal.
Correct Answer: B — Amplitude Modulation
Learn More →
Q. Which molecule exhibits sp hybridization?
-
A.
CCl4
-
B.
CO2
-
C.
NH3
-
D.
H2O
Solution
In CO2, the carbon atom is sp hybridized as it forms two double bonds with oxygen.
Correct Answer: B — CO2
Learn More →
Q. Which molecule has a bent shape due to lone pairs?
-
A.
CO2
-
B.
O3
-
C.
CH4
-
D.
BF3
Solution
O3 (ozone) has a bent shape due to the presence of a lone pair on the central oxygen atom.
Correct Answer: B — O3
Learn More →
Q. Which molecule has a central atom with dsp3 hybridization?
-
A.
SF6
-
B.
PCl5
-
C.
NH3
-
D.
CCl4
Solution
PCl5 has phosphorus in the center, which is dsp3 hybridized, leading to a trigonal bipyramidal geometry.
Correct Answer: B — PCl5
Learn More →
Q. Which molecule has a central atom with sp hybridization?
-
A.
CO2
-
B.
H2O
-
C.
NH3
-
D.
CCl4
Solution
In CO2, the carbon atom is sp hybridized, forming two double bonds with oxygen.
Correct Answer: A — CO2
Learn More →
Q. Which molecule has a square planar geometry?
-
A.
XeF4
-
B.
SF4
-
C.
ClF3
-
D.
NH4+
Solution
XeF4 has four bonding pairs and two lone pairs, leading to a square planar geometry.
Correct Answer: A — XeF4
Learn More →
Q. Which molecule has the highest electronegativity difference? (2021)
-
A.
HCl
-
B.
NaCl
-
C.
CO
-
D.
H2
Solution
NaCl has the highest electronegativity difference between sodium and chlorine, leading to a strong ionic bond.
Correct Answer: B — NaCl
Learn More →
Q. Which mountain range separates Europe and Asia? (2019)
-
A.
Himalayas
-
B.
Andes
-
C.
Ural Mountains
-
D.
Rocky Mountains
Solution
The Ural Mountains separate Europe and Asia.
Correct Answer: C — Ural Mountains
Learn More →
Q. Which mountain range separates Europe from Asia?
-
A.
Himalayas
-
B.
Andes
-
C.
Ural Mountains
-
D.
Rocky Mountains
Solution
The Ural Mountains are traditionally considered the natural boundary between Europe and Asia.
Correct Answer: C — Ural Mountains
Learn More →
Q. Which mountain range separates India from Tibet?
-
A.
Western Ghats
-
B.
Himalayas
-
C.
Aravalli Range
-
D.
Vindhya Range
Solution
The Himalayas separate India from Tibet.
Correct Answer: B — Himalayas
Learn More →
Q. Which movement was launched by Mahatma Gandhi in 1930 to protest against the salt tax? (1930)
-
A.
Non-Cooperation Movement
-
B.
Civil Disobedience Movement
-
C.
Quit India Movement
-
D.
Swadeshi Movement
Solution
The Civil Disobedience Movement was launched in 1930, prominently featuring the Salt March to Dandi.
Correct Answer: B — Civil Disobedience Movement
Learn More →
Q. Which movement was launched by Mahatma Gandhi in 1930 to protest against the salt laws? (1930)
-
A.
Non-Cooperation Movement
-
B.
Civil Disobedience Movement
-
C.
Quit India Movement
-
D.
Swadeshi Movement
Solution
The Civil Disobedience Movement was launched in 1930 to protest against the salt laws.
Correct Answer: B — Civil Disobedience Movement
Learn More →
Q. Which movement was launched by Mahatma Gandhi in 1930? (1930)
-
A.
Non-Cooperation Movement
-
B.
Civil Disobedience Movement
-
C.
Quit India Movement
-
D.
Swadeshi Movement
Solution
The Civil Disobedience Movement was launched by Gandhi in 1930 to resist British rule through non-violent means.
Correct Answer: B — Civil Disobedience Movement
Learn More →
Q. Which movement was launched by Mahatma Gandhi in response to the British salt monopoly? (1930)
-
A.
Non-Cooperation Movement
-
B.
Civil Disobedience Movement
-
C.
Quit India Movement
-
D.
Swadeshi Movement
Solution
The Civil Disobedience Movement was launched by Mahatma Gandhi in 1930 to protest against the British salt monopoly.
Correct Answer: B — Civil Disobedience Movement
Learn More →
Q. Which movement was launched in response to the Rowlatt Act of 1919? (1919)
-
A.
Civil Disobedience Movement
-
B.
Non-Cooperation Movement
-
C.
Quit India Movement
-
D.
Satyagraha Movement
Solution
The Non-Cooperation Movement was launched in response to the Rowlatt Act.
Correct Answer: B — Non-Cooperation Movement
Learn More →
Q. Which Mughal emperor is known for his policy of religious tolerance and the establishment of the Din-i Ilahi?
-
A.
Akbar
-
B.
Shah Jahan
-
C.
Aurangzeb
-
D.
Babur
Solution
Akbar is known for his policy of religious tolerance and for establishing the Din-i Ilahi, a syncretic religion.
Correct Answer: A — Akbar
Learn More →
Q. Which Mughal emperor is known for his urban planning and the establishment of new cities?
-
A.
Akbar
-
B.
Shah Jahan
-
C.
Aurangzeb
-
D.
Babur
Solution
Shah Jahan is renowned for his urban planning, particularly in the construction of Shahjahanabad (Old Delhi) and the city of Agra.
Correct Answer: B — Shah Jahan
Learn More →
Showing 20191 to 20220 of 24369 (813 Pages)