Related Questions

Which of the following metals does NOT react with cold or hot water?
A Aluminium
B Potassium
C Sodium
D Calcium
Which of the following metals does NOT react with Oxygen even at a high temperature?
A Silver
B Lead
C Aluminium
D Zinc
Which of the following metals does not react with air?
A Potassium, Nickel
B Gold, Platinum
C Gold, Silver
D Silver, Platinum
In __________ process, ions of salts react with water to produce acidity or alkalinity.
A Hydration
B Hydrolysis
C Electrolysis
D Dialysis
A machine can produce 10 units in 5 hours. Another machine can produce 5 units in 10 hours. Working together, how many units can they produce in 30 hours?
A 50 units
B 60 units
C 70 units
D 80 units
There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant?
A Mercury
B Arsenic
C Aluminium
D Lead
The forms in which various metals and non metals occur in nature are called minerals. Which of the following is not a metallic ferrous mineral?
A Cassiterite
B Sphalerite
C Chalcopyrite
D Calcite
A metalloid possesses the characteristics of both the metals and non-metals. Which of the following is not a metalloid?
A Arsenic
B Antimony
C Lead
D None of these
The most important chemical catalyst on the planet is chlorophyll, _____ carbon dioxide and water react to form chlorophyll, . [Fill n the blank with appropriate one]
A whose presence
B which is present
C presenting
D in the presence of which
A,B,C,D,E,G and I are seven friends who study in three different standards namely 5th, 6th and 7th such that not less than two friends study in the same standard. Each friend also has a different favorite subject namely History, Civics, English, Bangla, Science , Maths , and Economics but not necessarily in the same order. A likes Maths and studies in the 5th standard with only one other friend who likes Bangla. I studies with tow other friends . Both the friends who study with I like languages (Here languages include only Science , English and Bangla ) . D studies in the 6th standard with only one person and does not like Civics . E studies with only one friend . The one who likes history does not study in 5th or 6th standard . E does not like languages. C does not like English , Science or Civics. Which combination represents E's favorite subject and the standard in which he studies?
A Civics and 7th
B Economics and 5th
C Civics and 6th
D History and 7th

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