List of practice Questions

If three resistors of different values of resistance are connected in a series combination, then all of them will definitely have the same value of:
In an electrical circuit, the unit of potential difference between the ends of a resistance is:
In a magnetic field, the direction of the force acting on a current-carrying conductor perpendicular to the field is:
General formula of alkanes is:
Homologous series in the following are : (i) $C_2H_4$ and $C_3H_6$
(ii) $CH_3OH$ and $CH_3CHO$
(iii) $HCHO$ and $CH_3CHO$
The correct option in context of the above is :
Which of the following metal forms hydrogen gas with cold water?
Write the name and functions of any two plant hormones.
Mention the importance of stomata in plants.
Explain the importance of experiments of Mendel in the rule for the inheritance of traits.
Which mirror should be used to form an apparent and enlarged image of an object?
Which lens should be used to form an apparent and enlarged image of an object?
The reason for the blue colour of the sky is:
Write the IUPAC names of the following compounds:
What is soap? Write the chemical reaction for the preparation of soap and write two characteristics of soap.
Explain exothermic and endothermic reactions.
What is pH value? How is it related to hydrogen ion concentration?
Differentiate between minerals and ores.
What is the role of saliva in the digestion of food?
Why is the ozone layer important for us?
Write a short note on any two permanent methods of family planning.
The resistances 2Ω, 3Ω, and 5Ω are joined in series. If the two ends of the combination are joined to a potential difference of 30 volts, then find the potential difference between the ends of each resistance.
Write down the working and colours of the insulation of the wires used in the domestic electrical distribution circuit:
(i) Live wire
(ii) Earthing wire
(iii) Neutral wire
Explain
(i) Fleming’s Left Hand Rule and
(ii) Right Hand Thumb Rule. For which physical quantities are they used for finding their directions?
Write the balanced chemical equations for the following reactions:
Loop is placed in which part of the female reproductive system?