IIT JEE Practice Question and Answer
8Q: Where is the National Institute of Jute and Allied Fibre Technology located ? 1808 05b5cc6cee4d2b4197774e288
5b5cc6cee4d2b4197774e288- 1Telanganafalse
- 2Andhra Pradeshfalse
- 3West Bengaltrue
- 4Haryanafalse
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Answer : 3. "West Bengal"
Explanation :
Answer: C) West Bengal Explanation:
Q: A mixture contains 25% milk and rest water. What percent of this mixture must taken out and replaced with milk so that in mixture milk and water may become equal. 1808 05b5cc6b6e4d2b4197774d59e
5b5cc6b6e4d2b4197774d59e- 131.8%false
- 231%false
- 333.33%true
- 429.85%false
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Answer : 3. "33.33%"
Explanation :
Answer: C) 33.33% Explanation: Now, take percentage of milk and applying mixture rule 25 100 50 50 25 = 2 : 1 Hence required answer = 1/3 or 33.33%
Q: A wholesale dealer allows a discount of 20 % on the marked price to the retailer. The retailer sells at 5% below the marked price. If the customer pays Rs.19 for an article, what profit is made by the retailer on it ? 1808 05b5cc72ce4d2b4197774f7ab
5b5cc72ce4d2b4197774f7ab- 1Rs. 4false
- 2Rs. 3true
- 3Rs. 5false
- 4Rs. 1false
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Answer : 2. "Rs. 3"
Explanation :
Answer: B) Rs. 3 Explanation: Let wholesaler dealers marked price = 100%, Retailer's C.P = 80% And the retailer sells at 5% less than the marked price => S.P = 95%If S.P of 95% of the retailer costs Rs.19 to customer,so its C.P of 80% will cost 80 x 19/95 = 16 Profit made by the retailer = 19-16 = Rs.3
Q: Which of the following elements has the highest electronegativity? 1808 05b5cc62fe4d2b4197774b95f
5b5cc62fe4d2b4197774b95f- 1Chlorinefalse
- 2Brominefalse
- 3Fluorinetrue
- 4Heliumfalse
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Answer : 3. "Fluorine"
Explanation :
Answer: C) Fluorine Explanation: Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons. Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element and lithium is the least.
Q: What will come in place of the question mark(?) in the following question ? 56% of 870 + 82% of 180 = 32% of 90 + ? 1808 05b5cc6c5e4d2b4197774dd37
5b5cc6c5e4d2b4197774dd37- 1777false
- 2666false
- 3606true
- 4789false
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Answer : 3. "606"
Explanation :
Answer: C) 606 Explanation: 56% of 870 = 56x870/100 = 487.20 82% of 180 = 82x180/100 = 147.60 32% of 90 = 32x90/100 487.20 + 147.6 - 28.8 = ? ? = 634.8 - 28.8 ? = 606.
Q: Who proved that microorganisms cause disease? 1808 05b5cc69be4d2b4197774c7cd
5b5cc69be4d2b4197774c7cd- 1van Leeuwenhoekfalse
- 2Kochtrue
- 3Flemingfalse
- 4Pasteurfalse
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Answer : 2. "Koch"
Explanation :
Answer: B) Koch Explanation:
Q: Statements : National Aluminium Company has moved India from a position of shortage to self-sufficiency in the metal. Conclusions : a) Previously, India had to import aluminium.b) With this speed, it can soon become a foreign exchange earner. 1807 05b5cc715e4d2b4197774f418
5b5cc715e4d2b4197774f418- 1Only a followsfalse
- 2Only b followsfalse
- 3Neither a nor b followsfalse
- 4Both a and b followstrue
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Answer : 4. "Both a and b follows"
Explanation :
Answer: D) Both a and b follows Explanation: According to the statement, National Aluminium Company has moved India from a position of shortage in the past to self-sufficiency in the present. This means that previously, India had to import aluminium. So, I follows. Also, it can be deduced that if production increases at the same rate, India can export it in future. So, II also follows.
Q: What is Latus Rectum of Parabola? 1806 05b5cc6a0e4d2b4197774ca42
5b5cc6a0e4d2b4197774ca42- 1line segmenttrue
- 2vertexfalse
- 3focusfalse
- 4major axisfalse
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Answer : 1. "line segment"
Explanation :
Answer: A) line segment Explanation: As parabola is a locus of a point, which moves so that its distance from focus and directrix is always equal. The latus rectum of a conic section is the chord (line segment) that passes through the focus, is perpendicular to the major axis and has both endpoints on the curve. The length of the latus rectum is determined differently for each conic. The length of a parabola's latus rectum is 4p, where p is the distance from the focus to the vertex.