1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which one of the following statements is not true?
A
Clean water would have a BOD value of 5 ppm.
B
Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration upto 1 ppm.
C
When the pH of rain water is higher than 6.5, it is called acid rain.
D
Dissolved Oxygen (DO) in cold water can reach a concentration upto 10 ppm.
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
The pair of quantities having same dimensions is
A
Impulse and Surface Tension
B
Angular momentum and Work
C
Work and Torque
D
Young's modulus and Energy
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
The displacement 'x' (in meter) of a particle of mass 'm' (in kg) moving in one dimension under the action of a force, is related to time 't' (in sec) by t = $$\sqrt x + 3$$. The displacement of the particle when its velocity is zero, will be
A
4 m
B
0 m (zero)
C
6 m
D
2 m
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Vectors $$\overrightarrow A ,\overrightarrow B $$ and $$\overrightarrow C $$ are such that $$\overrightarrow A .\overrightarrow B = 0$$ and $$\overrightarrow A .\overrightarrow C = 0$$. Then the vector parallel to $$\overrightarrow A $$ is
A
$$\overrightarrow A \times \overrightarrow B $$
B
$$\overrightarrow B + \overrightarrow C $$
C
$$\overrightarrow B \times \overrightarrow C $$
D
$$\overrightarrow B $$ and $$\overrightarrow C $$
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