List of practice Questions

What are X and Y respectively in the following reaction sequence? 

The volume of an ideal gas contracts from 10.0 L to 2.0 L under an applied pressure of 2.0 atm. During contraction, the system also evolved 90 J of heat. The change in internal energy (in J) involved in the system is (1 L·atm = 101.3 J):

Three layers of liquid are flowing over a fixed solid surface as shown below. The correct order of velocity of liquid in these layers is: \includegraphics[]{127.png}
Which one of the following is not classified as pulse modulation?
‘A’ is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of 10% NaCl is added. What is the gold number of ‘A’?
‘A’ is a protecting colloid.
Which of the following is incorrectly matched?
The efficiency of a heat engine that works between the temperatures where Celsius-Fahrenheit scales coincide and Kelvin-Fahrenheit scales coincide is (approximately):

Aqueous CuSO4 solution was electrolysed by passing 2 amp of current for 10 min. What is the weight (in g) of copper deposited at cathode? (Cu = 63 u; F = 96500 C mol-1)

Match the following 

Identify the correct statement

Match the following

Removal of this gland results in the death of an individual

In the given figures of logic gates, if the inputs are A=1, B=0, and C=1, find the values of \( y_1 \), \( y_2 \), and \( y_3 \) respectively. 

 

Assertion (A): Rhodospirillum is not a photoheterotroph bacteria. 
Reason (R): Photoheterotrophs obtain energy from light but carbon from organic sources.

Assertion (A): Bacillo viruses attack insects and arthropods
Reason (R): They have no negative impact on non-target insects
These factors are favourable for the formation of oxyhaemoglobin:
I. High \( {pCO}_2 \)
II. High \( {pO}_2 \)
III. Lesser H\(^+\) concentration and lower temperature
IV. Higher H\(^+\) concentration and higher temperature
During blood clotting, in extrinsic pathway, thromboplastin activates:
An aircraft executes a horizontal loop of radius 1 km with a speed of 900 kmph. Then, the ratio of its centripetal acceleration to the acceleration due to gravity is:
At \(T\)K, for one mole of an ideal gas, \(P\), \(V\) and \({v}_{rms}\) were measured. A graph of \(({v}_{rms})^2\) (on y-axis) and \(PV\) (on x-axis) goes straight line passing through origin. Its slope is \(m\). What is its molar mass (in kg mol\(^{-1}\))?

Identify the correct statements from the following: 
[I.] At constant pressure, physical adsorption decreases with increase in temperature. 
[II.] Enthalpy of physisorption is higher than enthalpy of chemisorption. 
[III.] Gas mask used in coal mines consists of activated charcoal.

Identify the wrong matching

Assertion (A): Phloem fibres (bast fibres) are made up of sclerenchymatous cells. 
Reason (R): Phloem fibres are generally absent in primary phloem but found in secondary phloem.

Match the following list: 


 

Assertion (A): PCR is used to detect HIV. 
Reason (R): It is based on the principle of antigen-antibody interaction. 
 

Reticulopodia are found in: