Related Questions

Which one of the following is the chemical formula of Washing Soda?
A NaHCO3
B $$N{a_2}C{O_3} \cdot 10{H_2}O$$
C $$N{a_2}C{O_3} \cdot 5{H_2}O$$
D NaOH
সোডা ক্ষার (washing soda) এ শতকরা পানির পরিমাণ 62.94% হলে, যৌগটিতে পানির অনুর সংখ্যা নির্ণয় কর।
A 5
B 7
C  8
D 10
Washing soda is chemically represented by
A Na2CO3
B Na2CO3.H2O
C Na2CO3.10H2O
D NaHCO3
Which one among the following chemicals is used as washing soda?
A Calcium carbonate
B Calcium bicarbonate
C Sodium carbonate
D Sodium bicarbonate
After taking 30 socks out of the washing machine, Shamim noticed that the ratio of blue socks to brown socks to black socks was 2:3:5. How many black socks were in the washing machine?
A 21
B 15
C 9
D 6
During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration
A At time zero
B At the end of filtration
C When half the filtrate has been obtained
D At the end of filtration, but decreases with time subsequently
In washing type plate and frame filter press, the ratio of washing rate to the final filtrate rate is
A 4
B $$\frac{1}{4}$$
C 1
D $$\frac{1}{2}$$
The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is
A 0.25
B 0.50
C 0.75
D 1.25
What is the chemical name for ‘Baking Soda’ ?
A Sodium carbonate
B Sodium bicarbonate
C Sodium nitrite
D Sodium nitrate
The chemical name of baking soda is
A Sodium carbonate
B Sodium bicarbonate
C Sodium chloride
D Sodium nitrate

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