问题

对下列课外实验活动的叙述,不正确的是

A.用小卵石、活性炭和细沙等物品可制作简易净水器

B.将明矾晶体悬挂在饱和明矾溶液中,晶体的形状可改变但质量不变

C.利用柠檬酸具有酸的性质,可在碳酸氢钠溶液中加入柠檬酸制汽水

D.将少量高锰酸钾晶体放入汽油中振荡,可形成紫红色的溶液

参考答案
您可能感兴趣的试题
  • (5分)在CuSO4和ZnSO4的混合溶液中加入一定量的铁粉,充分反应后过滤,向滤出的固体中滴加稀硫酸,没有气泡产生,则滤出的固体是________(填名称),滤液中一定含有的溶质为________、
  • We can see _____ full moon on the evening of August ____ 15th every year.A. the; a B. a;a C. a;the D
  • Elephants, pandas and ________ are animals.A. chicks B. ducks C. penguins D. dolphins
  • After the rebuilding our school is becoming _______________.A. more and more beautiful B. more beaut
  • The school days are busy enough, yet the Taylors try hard to fit as much as possible _____ their kid
  • She can speak little English _______she dare to talk with foreigners.A. so B. or C. as D. but
相关内容