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The portal for filing Income Tax Returns in India is ________.
- TRACES
- e-Filing
- NSDL
- CPC
Answer: e-Filing
https://www.incometax.gov.in is the official e-Filing portal for ITR submission, TDS tracking, and tax services. Part of Digital India for transparent governance. [[CBDT Guidelines]]
True or False: Specific heat capacity is the heat required to raise the temperature of 1 kg of substance by 1°C.
- True
- False
Answer: True
Specific heat (c) = Q/(mΔT), unit: J/kg·K. Water has high c (4186 J/kg·K), moderating climate. Essential for calorimetry problems. [[NCERT Physics Class 11]]
Which part of the brain controls involuntary actions like breathing and heartbeat?
- Cerebrum
- Cerebellum
- Medulla Oblongata
- Thalamus
Answer: Medulla Oblongata
Medulla oblongata (brainstem) regulates vital autonomic functions: respiration, cardiovascular activity, vomiting, coughing. Damage can be fatal. Critical for neurophysiology. [[NCERT Biology Class 11]]
For a spontaneous process at constant T and P, the Gibbs free energy change (ΔG) must be ________.
- Positive
- Negative
- Zero
- Infinite
Answer: Negative
ΔG = ΔH - TΔS. If ΔG < 0, process is spontaneous; ΔG > 0, non-spontaneous; ΔG = 0, equilibrium. Unifies enthalpy and entropy for predicting reaction feasibility. [[NCERT Chemistry Class 11]]
True or False: Alluvial soil is the most widespread soil type in India.
- True
- False
Answer: True
Alluvial soil (deposited by rivers) covers ~40% of India, especially Indo-Gangetic plains. Fertile, rich in potash, supports intensive agriculture. Important for geography and agriculture. [[ICAR Reports, NCERT Geography Class 11]]
The work function of a metal is the minimum energy required to:
- Excite an electron
- Remove an electron from the surface
- Ionize an atom
- Break a chemical bond
Answer: Remove an electron from the surface
Work function (φ) is the threshold energy for photoelectric emission. Einstein's equation: K_max = hν - φ. Central to quantum explanation of photoelectric effect. [[NCERT Physics Class 12]]
The vascular bundles in dicot stems are arranged in a ________ pattern.
- Scattered
- Ring
- Radial
- Concentric
Answer: Ring
Dicot stems have vascular bundles in a ring (eustele), enabling secondary growth. Monocots have scattered bundles (atactostele). Key difference in plant anatomy. [[NCERT Biology Class 11]]
True or False: Benzene undergoes electrophilic substitution reactions readily.
- True
- False
Answer: True
Benzene's delocalized π-electrons attract electrophiles. Substitution preserves aromatic stability; addition would break resonance. Nitration, halogenation, sulfonation are classic examples. [[NCERT Chemistry Class 11]]
UPI stands for:
- Unified Payment Interface
- Universal Payment Integration
- United Payment System
- Unified Processing Interface
Answer: Unified Payment Interface
UPI enables instant bank-to-bank transactions via mobile apps (Google Pay, PhonePe, etc.). Developed by NPCI; revolutionized digital payments in India. Key for banking awareness. [[NPCI Reports, RBI Guidelines]]
The SI unit of magnetic flux is ________.
- Tesla
- Weber
- Henry
- Gauss
Answer: Weber
Weber (Wb) = magnetic flux; Tesla (T) = magnetic flux density (B = Φ/A). 1 Wb = 1 T·m². Important for electromagnetism problems. [[NCERT Physics Class 12]]
True or False: BMI stands for Body Mass Index.
- True
- False
Answer: True
BMI = weight (kg) / height (m)². Categories: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (≥30). Simple screening tool for weight-related health risks. [[WHO, MoHFW Guidelines]]
Which molecule exhibits hydrogen bonding?
- CH₄
- HCl
- NH₃
- H₂S
Answer: NH₃
Hydrogen bonding occurs when H is bonded to highly electronegative N, O, or F. NH₃ forms intermolecular H-bonds, explaining its high boiling point vs. PH₃. Critical for molecular properties. [[NCERT Chemistry Class 11]]
The 3R principle for waste management stands for Reduce, Reuse, and ________.
- Recycle
- Refuse
- Rot
- Repair
Answer: Recycle
3Rs promote sustainable consumption: Reduce waste generation, Reuse items, Recycle materials into new products. Core concept in environmental education and policy. [[MoEFCC Guidelines, NCERT Geography Class 11]]
True or False: Viscosity of liquids decreases with increase in temperature.
- True
- False
Answer: True
Higher temperature increases molecular kinetic energy, reducing intermolecular forces and internal friction. Hence, honey flows faster when heated. Opposite trend for gases. [[NCERT Physics Class 11]]
Bt cotton contains a gene from which organism for pest resistance?
- Agrobacterium
- Bacillus thuringiensis
- Escherichia coli
- Rhizobium
Answer: Bacillus thuringiensis
Bt gene produces Cry protein toxic to bollworm larvae but safe for humans. First commercially approved GM crop in India (2002). Important for biotechnology and agriculture. [[DBT Reports, NCERT Biology Class 12]]
The inert pair effect is most prominent in the ________ group of p-block elements.
- 13
- 14
- 15
- 16
Answer: 13
In Group 13 (B, Al, Ga, In, Tl), ns² electrons resist participation in bonding down the group. Tl⁺ is more stable than Tl³⁺ due to inert pair effect. Important for periodic trends. [[NCERT Chemistry Class 11]]
True or False: In blockchain, each block contains a cryptographic hash of the previous block.
- True
- False
Answer: True
This chaining via hashes ensures immutability: altering one block changes its hash, breaking the chain. Combined with consensus mechanisms, it provides security and transparency. [[NITI Aayog Reports]]
The power of a lens is measured in:
- Meters
- Diopters
- Candela
- Lux
Answer: Diopters
Lens power P = 1/f (in meters), unit: diopter (D). Positive for convex, negative for concave lenses. Used in prescribing corrective eyewear. [[NCERT Physics Class 10]]
The hormone that triggers ovulation in human females is ________.
- FSH
- LH
- Estrogen
- Progesterone
Answer: LH
LH (Luteinizing Hormone) surge from pituitary triggers release of mature ovum from Graafian follicle (~day 14 of menstrual cycle). Critical for reproductive physiology. [[NCERT Biology Class 12]]
True or False: The standard hydrogen electrode (SHE) has a potential of 0 V by definition.
- True
- False
Answer: True
SHE is the reference electrode with E° = 0.00 V at 298K, 1 atm, 1M H⁺. All other electrode potentials are measured relative to SHE. Fundamental for electrochemical series. [[NCERT Chemistry Class 12]]