1
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The most suitable reagent for the given conversion is : JEE Main 2020 (Online) 8th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 182 English
A
LiAlH4
B
B2H6
C
NaBH4
D
H2/Pd
2
JEE Main 2020 (Online) 8th January Morning Slot
Numerical
+4
-0
Change Language
The least positive value of 'a' for which the equation

2x2 + (a – 10)x + $${{33} \over 2}$$ = 2a has real roots is
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3
JEE Main 2020 (Online) 8th January Morning Slot
Numerical
+4
-0
Change Language
An urn contains 5 red marbles, 4 black marbles and 3 white marbles. Then the number of ways in which 4 marbles can be drawn so that at the most three of them are red is ___________.
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4
JEE Main 2020 (Online) 8th January Morning Slot
Numerical
+4
-0
Change Language
The number of all 3 × 3 matrices A, with enteries from the set {–1, 0, 1} such that the sum of the diagonal elements of AAT is 3, is
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