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Two identical balls A and B having velocities of $0.5 \text{ m/s}$ and $-0.3 \text{ m/s}$ respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be:
Which of the following events does not occur in rough endoplasmic reticulum?
Identify the correct order of the size of the following species: $Ca^{2+}, K^+, Ar, S^{2-}, Cl^-$
Identify the correct reagents that would bring about the following transformation (Alkene $\rightarrow$ Alcohol):
Among the human ancestors the brain size was more than 1000 cc in:
In the preparation of alkene from alcohol using Al₂O₃, which is an effective factor?
The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon is:
The product of the below-mentioned reaction is: (Reaction Scheme Missing)
The structure of C in the below-mentioned reaction is: (Note: Reaction scheme is missing from the provided text)
$$RMgX + CO_2 \xrightarrow{\text{dry ether}} Y \xrightarrow{H_3O^+} RCOOH$$ What is Y in the above reaction?
The formation of the oxide ion O²⁻(g) from oxygen atom requires first an exothermic and then an endothermic step as shown below: O(g) + e⁻ → O⁻(g); ΔH° = -141 kJ mol⁻¹ O⁻(g) + e⁻ → O²⁻(g); ΔH° = +780 kJ mol⁻¹ Thus, the process of formation of O²⁻ in gas phase is unfavourable even though O²⁻ is isoelectronic with neon. It is due to the fact that:
Which of the following arrangements is correct for increasing order of electronegativity?
An organ pipe filled with a gas at $27^\circ\text{C}$ resonates at $400\text{ Hz}$ in its fundamental mode. If it is filled with the same gas at $90^\circ\text{C}$, the resonance frequency at the same mode will be:
What results from the electrolytic reduction of nitrobenzene in a highly acidic medium?
Match the reagents in List-I with the corresponding reactions in List-II: **List-I (Reagent)** A. $H_2, Pd-BaSO_4$ B. (i) $CrO_2Cl_2, CS_2$ (ii) $H_2O/H^+$ C. $CO, HCl, \text{Anhyd. } AlCl_3/CuCl$ D. $CHCl_3, NaOH$ **List-II (Name of the reaction)** I. Gattermann-Koch reaction II. Reimer-Tiemann reaction III. Etard reaction IV. Rosenmund reduction Choose the correct answer from the options given below:
Which of the following pairs of ions are isoelectronic and isostructural?
The energy of electron in the ground state ($n=1$) for $He^+$ ion is $-x$ J, then that for an electron in $n=2$ state for $Be^{3+}$ ion in J is:
The correct order of decreasing second ionization enthalpy of Ti(22), V(23), Cr(24) and Mn(25) is:
Which of the following pair is correctly matched?
The weight of silver (atomic weight = $108$) displaced by a quantity of electricity which displaces $5600 \text{ mL}$ of $\text{O}_2$ at STP will be :