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Browse complete papersIdentify the element whose given valency does not match its typical valency.
| Element | Atomic number | Given Valency |
|---|---|---|
| Be | 4 | 2 |
| Ne | 10 | 0 |
| Al | 13 | 3 |
| F | 9 | 7 |
Al
F
Be
Ne
Correct answer
Al
Bleaching powder is a white solid with a strong chlorine smell. It is commonly used in:
making fertilisers and plastics
manufacturing cement and glass
disinfecting water and bleaching fabrics
preserving food and softening water
Correct answer
making fertilisers and plastics
A and B can together complete a piece of work in 25 days. They worked together for 20 days and then B left. After another 10 days, A completed the remaining work. In how many days can A complete the entire work alone?
54
60
40
50
Correct answer
54
Harish and Vineet move towards town B starting from town A, at a speed of 35 km/h and 36 km/h respectively. If Vineet reaches town B 40 minutes earlier than Harish, what is the distance between towns A and B?
840 km
841 km
834 km
838 km
Correct answer
840 km
For image formation by a concave mirror, which of the following statements is true?
At the centre of curvature, the size of the image is the same as the size of the object.
The nature of the image is real and erect when the object is at the centre of curvature.
An object placed at the focus forms a highly diminished image.
The size of the image is enlarged when the object is placed at infinity.
Correct answer
At the centre of curvature, the size of the image is the same as the size of the object.
Who among the following was posthumously awarded the Padma Vibhushan in January 2025 for his or her contributions to literature and education?
Sharda Sinha
MT Vasudevan Nair
Kumudini Lakhia
Osamu Suzuki
Correct answer
Sharda Sinha
Which of the following correctly lists the sections of the Western Coastal Plains in India?
Karnataka Coast, Eastern Coast and Malabar Coast
Konkan Coast, Coromandal Coast and Vembanad Coast
Konkan Coast, Karnataka Coast and Malabar Coast
Northern Circar Coast, Malabar Coast and Coromandel Coast
Correct answer
Karnataka Coast, Eastern Coast and Malabar Coast
The Dachigam Sanctuary, located in Jammu and Kashmir in India, is home to which of the following species?
Indian bison
Snow leopard
One-horned rhinoceros
Hippopotamus
Correct answer
Indian bison
Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which letter-cluster DOES NOT belong to that group?
(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)
JLK
RTU
NPO
FHG
Correct answer
JLK
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
Statements:
All piles are quantities.
All stores are quantities.
Conclusions:
(I): Some piles are stores.
(II): Some quantities are stores.
Only conclusion (II) follows
Both conclusions (I) and (II) follow
Only conclusion (I) follows
Neither conclusion (I) nor (II) follows
Correct answer
Only conclusion (II) follows