CDS Exam (II)- 2021 - General Knowledge Defence Question Paper

CDS Previous Year Question Papers Question Papers
CDS Exam (II)- 2021 - General Knowledge

CDS Exam (II)- 2021 - General Knowledge Defence Questions

21.
Refraction of light, as it enters from one transparent medium to another, is due to
A.
change in temperature of the media.
B.
change in the amplitude of light.
C.
change in speed of light.
D.
internal property of light.
😑 View Answer Error
ANSWER :
C. change in speed of light.
22.
A bus starting from a bus-stand and moving with uniform acceleration attains a speed of 20 km/h in 10 minutes. What is its acceleration?
A.
200 \( km/h^{2} \)
B.
120 \( km/h^{2} \)
C.
100 \( km/h^{2} \)
D.
240 \( km/h^{2} \)
😑 View Answer Error
ANSWER :
B. 120 \( km/h^{2} \)
23.
Which one of the following is the correct reactivity order of metals reacting with dilute HCl?
A.
\( Mg > Al > Zn > Fe \)
B.
\( Mg < Al < Zn < Fe \)
C.
\( Mg > Zn > Fe > Al \)
D.
\( Fe > Mg > Al > Zn \)
😑 View Answer Error
ANSWER :
A. \( Mg > Al > Zn > Fe \)
24.
Which one of the following acids is secreted by leaves of Nettle that causes painful stings?
A.
Methanoic acid
B.
Citric acid
C.
Tartaric acid
D.
Acetic acid
😑 View Answer Error
ANSWER :
A. Methanoic acid
25.
Which of the following statements is/are correct?
1. All the bases are alkali.
2. All alkalis dissolve in water.
3. Alkalis are soapy to touch, bitter in taste and corrosive in nature.
Select the correct answer using the code given below:
A.
1 only
B.
1 and 3 only
C.
2 and 3 only
D.
3 only
😑 View Answer Error
ANSWER :
C. 2 and 3 only
26.
Which one of the following materials is present in a guard tube (drying tube) that is used for preparation of HCl gas?
A.
Calcium chloride
B.
Calcium bromide
C.
Calcium iodide
D.
Calcium fluoride
😑 View Answer Error
ANSWER :
A. Calcium chloride
27.
Fertilizers are used to obtain higher yields of crops. However, all nutrients are usually not available in fertilizers. Which one of the following nutrients is usually not available in fertilizers?
A.
Iron
B.
Potassium
C.
Nitrogen
D.
Phosphorus
😑 View Answer Error
ANSWER :
A. Iron
28.
Rupa and Sachin observed an animal in their school garden. Rupa called it an insect while Sachin identified it as an earthworm. Which one of the following characteristics confirms that it is an insect?
A.
The animal had jointed legs.
B.
Body of the animal had very little segmentation.
C.
Body of the animal was cylindrical.
D.
Body of the animal was bilaterally symmetrical.
😑 View Answer Error
ANSWER :
A. The animal had jointed legs.
29.
Animals which are marine, bilaterally symmetrical, have a coelom and a notochord, but never form a vertebral column are placed under which one of the following groups?
A.
Chordata
B.
Protochordata
C.
Vertebrata
D.
Mammalia
😑 View Answer Error
ANSWER :
B. Protochordata
30.
What is the location of intercalary meristem in plants?
A.
Base of the leaves or internodes
B.
Stems or roots
C.
Tips of stems and leaves
D.
Base of flower pedicel
😑 View Answer Error
ANSWER :
A. Base of the leaves or internodes
Prev Next page