CHEMISTRY
Q. When 1 mole of ice melts at $0^\circ\text{C}$ and constant pressure of 1 atmosphere, 6025 J of heat is absorbed by the system. The molar volume of ice and water are 0.020 and 0.018 $\text{dm}^3$ , respectively. Calculate $\Delta E$. ($1\text{dm}^3\cdot\text{atm}=101.33\text{J}$)
Answer: 6025.20J
Q. For a first order reaction A $\rightarrow$ B, the rate constant is 0.0458 $\text{s}^{-1}$ . Calculate rate of the reaction if the concentration of reactant is $0.35\text{mol dm}^{-3}$ .
Answer: 0.016 $\text{mol dm}^{-3}\text{ s}^{-1}$
Q. The unit of KC for the system $\text{PCl}_5 \rightleftharpoons \text{PCl}_3 + \text{Cl}_2$ is
Answer: $\text{mol/ dm}^3$
Q. Consider $\text{N}_2 + 3\text{H}_2\text{(g)} \rightleftharpoons 2\text{NH}_3\text{(g)}$ $\Delta H= -92.46\text{kJ/mol}$ The optimum temperature ($^\circ\text{C}$), to produce ammonia is
Answer: 450
Q. A reaction is first order with respect to A and second order with respect to B, the rate equation is
Answer: Rate = k [A][B]$^2$
Q. The example of metallic solid is
Answer: Cu
Q. When a crystalline substance conducts current in one direction but not through other directions of the crystal, this property is
Answer: Anisotropy
Q. Forward reaction is the one that
Answer: Takes place from left to right as given in chemical equation
Q. How many moles of $\text{NaCl}$ are produced from 16.5g of $\text{HCl}$, according to the neutralization reaction? $\text{HCl(aq)} + \text{NaOH(aq)} \rightarrow \text{NaCl(aq)} + \text{H}_2\text{O(l)}$
Answer: 0.452
Q. The unhybridized p orbital in $\text{sp}^2$ hybridization is
Answer: Perpendicular to $\text{sp}^2$ orbitals
Q. 760 torr is equal to ___ Pascal
Answer: 101325
Q. How many grams of $\text{CO}_2$ can be produced by thermally decomposing 10 moles of $\text{ZnCO}_3\text{(S)}$?
Answer: 440
Q. Molar heat of vaporization of water is
Answer: 40.7 kJ/mol
Q. Which one of the following molecules has a pyramidal structure?
Answer: $\text{NH}_3$
Q. What is the mass of 1 mole of calcium carbonate ($\text{CaCO}_3$)?
Answer: 100g
Q. Total number of electron pairs present in the valence shell of central atom in water are
Answer: 4
Q. Which element has the electronic configuration of noble-gas notation $\text{[Kr], 5s}^2\text{ , 4d}^2$
Answer: Zr
Q. The splitting of spectral lines in magnetic field is
Answer: Zeeman effect
Q. Heating 24.8g of copper carbonate ($\text{CuCO}_3$) in a crucible produced only 13.9g of copper oxide ($\text{CuO}$). What is the percentage yield of copper oxide?
Answer: 86.87%
Q. Which of the following sub-shell does not exist?
Answer: 1p
Q. Actual yield will reach the ideal (theoretical) value if the % yield of the reaction is,
Answer: 100%
Q. How many moles are there in 60g of sodium hydroxide ($\text{NaOH}$)?
Answer: 1.5
Q. Acetic acid can be prepared by the hydrolysis of Methyl cyanide
Answer: Methyl cyanide
Q. Protein present in haemoglobin has _______ structure.
Answer: Quaternary
Q. In competitive inhibition, the inhibitor
Answer: Competes with substrate
Q. Which aldehyde is more reactive towards nucleophilic addition?
Answer: Formaldehyde
Q. The reaction of an alcohol with sodium produces
Answer: Alkoxide
Q. Which of the following has the highest boiling point? ethyl alcohol, isopropyl alcohol, n-propyl alcohol, tert-butyl alcohol
Answer: n-propyl alcohol
Q. The carbon atom carrying positive charge and attached to three other atoms or groups is called
Answer: Carbocation
Q. The pKb of n-propyl amine is
Answer: 3.28
Q. Addition of HBr to isobutylene mainly gives
Answer: tert-butyl bromide
Q. The homolytic fission of C-H bond in an alkane result in
Answer: Alkyl free radical
Q. Which of the following elements cannot be detected directly in a given organic compound?
Answer: Oxygen
Q. Pyridine belongs to which class of organic compounds?
Answer: Heterocyclic
Q. Potassium ferrocyanide is which type of salt
Answer: Complex
Q. Cu2+ salt solution is blue in colour due to transition of electrons from d to d orbital
Answer: d-d transition
Q. Third period element that initially reacts rapidly with oxygen to form a protective oxide coating that prevents further reactions is
Answer: Al
Q. Which of the following alkali metal forms only normal oxide with O2?
Answer: Li
Q. Electronegativity of Al is approximately equal to that of Be
Answer: Approximately equal
Q. The electrode potential of the standard hydrogen electrode is chosen as
Answer: 0 V
Q. Which one of the following is a strong electrolyte in solution?
Answer: Potassium iodide
Q. The heat of sublimation of potassium is 98kJ/mol, the heat of dissociation of bromine gas is 192.5 kJ/mol. The ionization energy of K is 414 kJ/mol. The electron affinity of Br is -334.7 kJ/mol and the heat of formation of KBr is -405.8 kJ/mol. Calculate the lattice energy of KBr
Answer: 669.5
Q. ∆H can be measured indirectly by applying Hess’s law
Answer: Hess’s law
Q. One slice of bread with a tablespoon of peanut butter on it contains 20g carbohydrate, 10g protein, and 9g fat. Calculate total energy consumed in this intake.
Answer: 201kcal
Q. Calculate the work done when 1 mole of an ideal gas expands from 15 dm3 to 20 dm3 against a constant external pressure of 2 atmospheres.
Answer: -10 atm.dm3
Q. When 1 mole of ice melts at 0°C and constant pressure of 1 atmosphere, 6025 J of heat is absorbed by the system.
Answer: 6025.20J
Q. For a first order reaction A → B, the rate constant is 0.0458 s⁻¹.
Answer: 0.016 mol dm⁻³ s⁻¹
Q. The unit of KC for the system PCl5 ⇌ PCl3 + Cl2 is
Answer: mol/dm³
Q. Consider N2 + 3H2 ⇌ 2NH3 ΔH = -92.46 kJ/mol
Answer: 450°C
Q. A reaction is first order with respect to A and second order with respect to B
Answer: Rate = k[A][B]²
Q. The example of metallic solid is
Answer: Cu
Q. When crystalline substance conducts in one direction only
Answer: Anisotropy
Q. Forward reaction is
Answer: Left to right
Q. NaCl from HCl
Answer: 0.452
PHYSICS
Q. Electron Volt (eV) is another unit of
Answer: Energy
Q. Photon momentum
Answer: h/λ
Q. Photoelectric effect condition
Answer: Below threshold frequency no effect
Q. Lenz’s law is consistent with
Answer: Conservation of energy
Q. Induced current direction
Answer: Lenz’s law
Q. Solenoid magnetic field
Answer: Along axis
Q. Magnetic force formula
Answer: F = qv × B
Q. Electron in magnetic field force
Answer: Maximum when perpendicular
Q. Maximum power transfer theorem
Answer: Rload = Rsource
Q. Resistance relation bulbs
Answer: R1 is twice R2
Q. Temperature coefficient
Answer: Per degree rise
Q. I-V graph non-ohmic
Answer: Curved
Q. Capacitor dielectric removed
Answer: Electric field increases
Q. Centripetal force change
Answer: Half
Q. Angular displacement
Answer: Angle swept
Q. 3 revolutions
Answer: 6π
Q. Escape velocity depends on
Answer: Mass of Earth
Q. Work done
Answer: 50 J
Q. Work by weight
Answer: Zero
Q. Inertia
Answer: Resistance to change
Q. SI unit
Answer: Watt
BIOLOGY
Q. Which is NOT true about viruses?
Answer: Can replicate on their own
Q. Canal system is characteristic of
Answer: Porifera
Q. Shark belongs to
Answer: Chondrichthyes
Q. Malpighian tubules in
Answer: Grasshopper
Q. Smooth muscle NOT related to
Answer: Heart wall
Q. Humulin produced using
Answer: Bacteria
Q. Natural killer cells activated by
Answer: Interferons
Q. Cerebellum controls
Answer: Balance
Q. Osteocytes are
Answer: Bone cells in lacunae
Q. Gonorrhoea spread by
Answer: Sexual contact
Q. Perimetrium is
Answer: Outer uterus layer
Q. Corpus luteum formed from
Answer: Graafian follicle
Q. Passive immunity example
Answer: Mother’s milk antibodies
Q. Reflex action does NOT involve
Answer: Brain
Q. Mitochondria function
Answer: Protein synthesis
Q. Enzymes work by
Answer: Lowering activation energy
Q. DNA + protein forms
Answer: Chromosome
Q. Steroid production organelle
Answer: Endoplasmic reticulum
Q. Sickle cell anaemia
Answer: Amino acid substitution
Q. Oxidative phosphorylation
Answer: ATP synthesis method
Q. HIV enzymes located
Answer: Inside capsid
Q. Virus cannot
Answer: Excrete
ENGLISH + REASONING
Q. Synonym of Meticulous
Answer: Conscientious and Precise
Q. Elated synonym
Answer: Thrilled and Overjoyed
Q. Blueprint : Architect :: Algorithm :
Answer: Programmer
Q. Distance problem
Answer: 2 m
Q. Discount problem
Answer: Rs. 500
Q. Inference exercise paragraph
Answer: Busy schedules and lack of motivation
Q. All omnivores logic
Answer: I and II
×